Thanks for the info. Which Schwalbe Pro 1 did you test? I recently purchased a set of the new Addix compount in 28c to go on q 21mm internal width rim. I was feeling like maybe I should have gone up a size (30c), but according to your measurements it ballons a bit.
@@ayowser01 clearly the older one. My new addix TLE version on 23mm internal width is narrower than that. I post the measurement in one of my reply in this video.
@@ayowser01 I'm running the pro one 30mm on the front and schwalbe one on the back because we have a flint problem on the local roads and the protection is better on the One
We have customers coming to us fixated with running certain tire widths, this is a great video Shane as you have explained it all very well. Just because the box says 25 or 28mm it means nothing if you run different width rims. No tire width or pressure is perfect for everyone, it varies from rider to rider, weather, road surface, etc. I will share this on our Facebook page. Love your work!
The reason the 28s didn't blow out completely when on the 21mm rims is that for each tyre/rim combo, there is the same amount of tyre for each test, so essentially you are "stretching" or "squeezing" the tyre on the different combos. The smaller internal rim width will yield a skinnier tyre, although normally a bit higher, and the wider rim then it becomes a bit flatter at the top and wider on the sides, but the tyre rim interface becomes a smoother transition. Hence why on the 17mm there was less space between the tyre and the seat tube. As for ride feel, horses for courses.
I run 28mm tubeless at the low end of the rated tire psi, this turns the road into butter for me. I can accelerate through train tracks while others pause, same with rough road surfaces. Overall a smoother and more confident ride. I do not race, Fondos and group rides only
I'm riding a 2019 TCR SL disc, size ML. I am running Vittoria Corsa 2.0 TLR 28mm tubeless at 70psi on 25mm internal WR65 Light Bicycle wheels. Width, as measured, is 30.9mm, so clearance is only 2mm at the chainstays. I have 5000km on this setup on Melbourne roads, mostly in the Dandenongs, no issues with getting anything caught between the tyre and frame. I only ride the TCR on sealed roads and on dry days, I ride my gravel bike when it's wet, or for mixed-terrain rides.
I'm glad I went for the 25 mm for my GP5000 on my TCR Rim 2020. 3mm clearence on the rear with a 19 wide rim is not something I feel comfortable with. Thank you for this video.
Hi. A bit late, but on my Specialized Venge, 2016, I use 25 mm GP5000. But need changing, punctures and waer. I use Campagnolo Vento, 700x22. 17 mm base width. I checked with the famous 3mm allen key, all clear, front and back. I use the continental butyl clinchers. So, will buy myself the 28mm GP5000 and I have at least an educated guess.
Yup it fits. I've the exact same TCR as you and have been running 28C tire on Enve 4.5 AR Disc wheels with no issues. The internal rim width is 25mm and I have pleanty of clearance and haven't ever rubbed with Schwalbe Pro One Tubeless or Hutchinson Fusion 5 Galatik. Measured width with the Schwalbe and Enves are about 32mm once mounted.
A while back I tried 28mm GP4000SII tyres on my 2018 TCR Disc, hardly any room left (they ballooned up to well over 30mm, 19mm internal width rim) on the back. Good when it was dry but not in the wet. They also felt too squisy and not direct enough. Went back to 25mm GP4000SII and after that to Speci Sworks Turbo 26mm (enormous improvement in grip) On my winter bike (gravelbike, room isn't a problem there, 2.1" tyres even fit) I tried the 28mm Conti's, really didn't like them (same as on the TCR), for this winter I switched to 28mm Schwalbe One TLE on other rims (DT Swiss, 21mm internal), they blow up to well over 30mm (first install was under 30mm but after one ride they got a bit wider). I set them up tubeless an run 4-4.5bar of pressure (I'm 83kg heavy) and they feel absolutely great, lots and lots of grip, even in the wet and cold. They do feel a bit slower then the Speci 26mm tyres. On the summer bike I have the faster 25mm Schwalbe Pro One TLE but haven't really ridden those, they come in at almost 28mm on my new carbon wheels (21mm internal)
I hate riding across resurfaced roads with all the rocks bouncing of the frame horrid noise and you know chips are happening. Nice to see tubes being used still 👍
Wicked Pissah Cool Video GPLama you’re roads are considered smooth as Silk compared to my Rough roads here in my home state of Massachusetts USA 🇺🇸 😁. I run 28’s on my Tarmac and loving them.
My findings. Giant TCR SL 2019. 28cGP5000TL on SLR 1. They inflate to around 28.5mm Rear: 4.5mm - Chainstayy 10mm - Seattube Front: 3mm - Fork I will from now on be running GP5000 25c on the front and 28c on the back. For reference used to run 28c Schwalbe Pro Ones front and back but they inflated to around 27.5mm .
I have a Scott 56CM and run 28mm tyres. Clearance is more than 3mm and road feel for me being 100kg is way better than on 23mm tyres. The only issue I have in South Africa is sourcing the right size tubes. Lots of 18-25mm or 20-25mm and 35-45mm but not many suppliers carrying stock for 28mm (and then there is the valve length if you do manage to find a few boxes) Thanks for another great video Shane
With wider internal rims, bigger tyres bulge less (light bulb shape), meaning instead of being round it sits flatter. so with tyre pressure it might just be an extra +/- 1mm on each sides like on the Roval. The wider bulge on both sides comes from using 28mm tyres on 17 internal or less, that means fat tyres, no aerodynamics, too cushy and greater chance of frame rub. so if you fit and 27mm external rim and internal 19-21 and they fit the frame, you have better chances of fitting 28mm easier.
Thanks for the video. I have exactly the same bike that you have except that mine is a large frame. I've been riding with the GP5000/28 for the last year and have not had any difficulty. I didn't check the clearance as closely as you did, but haven't noticed any issues with clearance at all. From the website on tire pressure, I see that I might be running too high a pressure, so I am going to try a lower pressure. Thanks again.
More good stuff. Allen keys as feeler gauges is a solid concept. I have been here, done that myself. On my old Trek 5500 rim brake bike with Mavic Ksyrium's. Ran 25's in GP 4000's forever, then tried to move to 28's after a crash forced me into a new fork and front brake which resulted in much more room, at least up front. I still wasn't sure, especially at the back, so I bought a single 28 Gatorskin to test with, and it worked just fine. So I bought 28 GP 4000's, and DRAT!!! The rear was having none of this. Chainstays were locked solid! Even at only 55 psi! So I emailed Conti, and they suggested I try a Grand Prix 4 Season which worked. Now, I'm slow, old and fat, so not worried about them not being the top of the line speed tires. Moral to the story is not all 28"s are the same...
Contis GP4000 were notorious for running big with the 25s running at 28.5 and their speced 28s closer to 31-32. The newer GP5000 run true to the size so once you switching to them from the 4000s you might want to size it up. In other words GP4000 25 = GP5000 28 and GP4000 28 = GP5000 32 (almost)
TCR Advanced SL 2 KOM rim brakes with SLR 1 wheels 28mm Continental GP5000TL. The front tire has 3-4mm allen clearance (4mm slides through but rubs). Had a freak crash last November, went over the front end, on the flats. No idea what happened. Wondering if this might have caused the crash? I have not been back on the road yet, but started zwift, thanks Shane for all the info! Also, I noticed the rear tire of GP5000TL is already worn out after around 1500 miles. Considering swapping the front 28 to the rear and getting a smaller tire for the front. BTW, I tried schwalbe 28s and could not get them to seat on the SLR1 rims. The stock Giant Gavia 0 Tubeless, 700x25 tires are easy to get on and off the SLR1 rims and don't lose much pressure like the contis, but they are noticeably slow.
I’ve used the following on my TCR: 1. 28mm GP 4 Seasons with regular tubes 2. 25mm Michelin Pro4 endurance with regular tubes 3. 28mm GP5000TL The most comfortable but most rolling resistance were the 4 seasons. I felt that they blew up like mtb tyres. As for performance, the Pro4s and GP5000s felt too similar to notice the difference, but the GP5000s were marginally more comfortable. I’ve settled on the 28mm GP5000s for winter and will switch to 25mm GP5000s for summer once the roads are cleaner.
Great video shane. Learnt 2 things by watching this 1) 28mm tyres will fit on my 2018 giant Tcr. 2) not much of a difference in ride quality over 25s to justify going up a size anyway. Glad I watched this 👍
Continental reduced their tyre size from the gp4000 to gp5000. My 25mm gp400 were really pushing front clearance on my 2016 rim brake Scott addict both on the top of the brake ridge (6800 callipers) and sides of the fork. On the rear they fit no worries. By memory on my 21ish inner diameter alloy wheels these measured about 30mm! When I went to gp5000 25mm they measure around 27.5mm. Heaps of clearance on the back. Front passes 3mm Allen key test but probably couldn’t go much wider. Also on r8000 callipers now so brake clearance has been increased considerably. Gp5000 are narrower for the same size than gp4000
I've gone from 25mm Vittoria Corsa with thin Specialized butyl tubes at about 90-95 psi, to 28mm Corsas with those Challenge latex tubes, at typically 75-80 psi. My experience is roughly yours. Yes, comfort has improved in my opinion, but nothing earth shattering. Also I live in Sweden, and we still have our fair share of silky smooth roads, so most of the time narrow high pressure tires work fine. On rare occasions when I end up on a gravel road with my road bike I definitely feel more secure on the 28s, though!
I'm running 30mm schwalbe on 20mm internal rims because I put them on for Flanders and PR sportives and can't be bothered dealing with dealing with tubeless sealent and the roads are getting worse since the virus. I plenty of room on my Kinesis GF as I bought it as a winter bike with two major attributes. One titanium to deal with the winter salt on the roads and two long drop brakes so I could fit 25 or 28mm tyres with mudguards.
I always thought the internal rim width and the tyre size were the important parts to know. well, now, keeping the external rim width almost flushed (105%) with the tyre for aero is the newest addition to the list of factors that I should be worried about 👍
I have Roval C38s and use 28c tyres with tubes. I have used the GP5000 and now trying the Pirelli P Zero Velo 4S..I have found the Pirelli a lot easier to get on and off the rim. After having 28s, I would not go back to 25s. They are more comfortable and provide a little more grip and confidence when cornering, especially in the wet. Have not noticed any perception of them being slower than 25s
I switched to 28 mm schwalbe pro one several years ago and these were actually 30mm when measured. I have Stans Avion and Grail rims which are 21mm wide and have now gone to schwalbe 30mm pro one on the front and schwalbe one on the back . Running at around 60 psi . Our local roads are rough so comfort is key. We have a lot of flints in the road so it's a chore to check the tyres before each ride and pull out the embedded teeth. I'm running tubeless so extra care is needed to make sure the sealant is still liquid in the tyre. The frame is a 2019 defy which has clearance for up to a 35mm tyre on the wide rims or 30mm tyre with mudguards. The local roads have seen off every kind of winter tyre from conti, pirelli goodyear and even marathon supreme. I'm sticking with the soft pro one for the grip but in 5 winter months there are dozens of small cuts all round the tyre so they will probably be retired early along time before they wear out.
After checking out your tubeless vid Shane replaced the Cadex 26s for Schwalbe 28 Pro Ones on a 2021 TCR. Certainly more fiddling than tubes and took a while to seat but the soapy water tip saved the day. 😀Ride very nicely tho.
My 28mm Conti’s 4Seasons ballooned on my PR2’s to 31mm! Rode over new surface road and scratched my fork crown and stays/bottom bracket. Now I always use plenty of space! Sold that bike.
For whatever reason, this just popped up on my suggested list. 2 years later I am still happy to say, why did we move to 28mm and disc brakes anyway? Nothing wrong with 23-25mm and rim brakes from just 2 or 3 years previous to this video!
Well i run tubulars, and run 25mm for a while but went back to 23mm, it just feels better when cornering, but that is hotmix not chipseal and not clinchers.
That's a win! Looking to do the same so nice to get a gauge on the IRL height/width. More interested to see how they fitted on traditional ~18mm internal rim widths which are normally rated at 25mm max. Wonder if the tubeless 18mm internal vs 28mm TL tyre will cause bulging issues. GP5000/4000ii are the tyre of choice!
Lightbicycle AR56 wheels, the rim is 23mm internal, 30mm external. I ride specialsed Roubaix Pro 2Bliss tyre setup tubeless. Outer casing is 32mm but measures 35mm at 55 PSI
2016 (?) Giant Defy SL 0 with Giant's SLR carbon rims. I changed from 23 to 25 (Conti 4000s) and now I'm on 28 mm Conti 5000 all with tubes. Going from the hard as a rock 23's to 25 and now 28's have all improved the ride, My tubeless Specialized Diverge gravel with the 42mm Pathfinders are very comfortable but more harder to push say over 16 MPH. Go big!
My 2018 Giant TCR Advanced SL rim brake runs Campy WTO 60 clincher wheelset (19mm internal rim width) with Pirelli P Zero 25mm tyres or Vittoria Corsa Graphene 2.0 25mm tyres...I am quite happy with 25mm tyres...
I ride on 23 mm tubulars on deep carbon wheels on the recently completed "world's longest bike path" here in Qatar. The roads are so rough from construction in most of the city, however, that I otherwise keep my road bike inside on the trainer unless I'm driving it to the track. The roads here require a gravel bike at least.
Interesting Shane! Suggestion for editing - it would have been nice to present a table of the inflated dimensions and difference before and after. Only 1.7mm taller means I might have to consider the 28s for my older bike, since 25mm GP5000s fit with a few mm to spare. What pressure did you run each at? If you used 80psi for both as mentioned when checking dimensions, then no wonder you didn't see a ride comfort improvement. Maybe try them softer?
2016 Giant Defy with 17mm internal rims. Running Roubaix pro clincher tyres in oddball 23/25 size at 95PSI. Tried same tyre in oddball 25/28 size with 70PSI and the ride was much smoother, so much so that it was even ok on gravel roads which the smaller tyres are most definitely not. I've also had some GP4000 II 25's on the rims and they are the same measured size as the 25/28 Roubaix tyres.
Good to see you didn’t have any issues fitting the GP5000’s. Read a lot of stuff online about them being tough to fit but guess it depends on the rims you have.
@@IanB17 To be honest, at first I struggled a lot, so I started googling, found and used this technique and it popped on pretty easily. www.roadbikerider.com/get-bike-tire-on-rim/
I'm running Vittoria Corsa Control 28mm on my Pinarello F10, with a clearance of less than 2mm. That's not enough, and while I am concerned about debris getting between the tire and frame, it's rare enough that I'll risk it. So far after a month, no bad effects. Forgot to mention, the rim is 21mm internal. I need to measure the tire size and clearance after this month of riding just for reference. The ride is wonderful and fast! One thing to note; if you have a rapid flat, the tire will collapse and mushroom and it will end up rubbing the frame until you come to a stop, so for those of you with close clearance, be aware of this.
Switched from 25mm to 28mm in 2018 & won't go back down lower now. I live and ride in London and the roads you are riding on look super smooth in comparison!
I am setting up a new Orbea OMX with 2020 Zipp 303 and Conti GP5000 28 mm clinchers with latex inner tubes. Frame is supposed to accommodate even larger tires so expect all A-OK. Waiting for the tires to be delivered --- expecting them to show up today. Zipp says the 303 rims are designed with 28 mm tires in mind for best aerodynamics.
As much as I loved the GP4000s tires in the past we have to get honest here: Continental has been *cutting corners* to achieve their tubeless tires! The sidewalls aren't reinforced and their bead isn't hookless compatible. Essentially you're getting a normal tire that works with sealant. Many people on the forums and on Reddit have issues with these tires: damage on the fragile sidewalls runs them inoperable! So *not* a proper tubeless tire!
Interesting....I only just started using my first ever GP4000S2 tyre that I bought on a clearance sale from Chain Reaction website about 3 years ago (last batch ever sold). I had only ridden them for ~1900km (with plenty of tread left) when I cut the sidewall (victim of Melbourne sealed road/bikepath pothole presumably). I will be interested to see if I can wear the 3 remaining tyres before the sidewalls are damaged....I have never failed a sidewall due to a cut before in 35 years of riding road bikes. The only other tyre sidewall I have damaged was a buldge in a heavily worn Vittoria Rubino Pro 3 but I was doing quite a bit of gravel riding so probably hit something hard etc
@@richardggeorge I have had 8 sets of 4000S tyres. I live in the Netherlands so the roads are 90% of the times almost perfect. I had two that I had to discard prematurely due to cuts in the side wall. And two that were already almost fully worn anyway.
I've got some 25mm internal width deep aero rim coming to take either 30-32mm tubeless tyres. I'm thinking of trying G One Speed tyres first. My bike is an adventure frame so can take 45mm 700C tyres.
I just purchased these exact tires for my 2019 Giant Propel Advanced Disc Pro with the SLR One wheel set planning to install in the next few weeks, thanks for the info
So, about a year ago my road bike frame cracked and I decided to replace it with a gravel bike. I've been riding a year now on 38mm semi-slick gravel tires on every ride, road or gravel and...I don't think I can ever switch back to 23mm tires. Even 23mm tubeless on the local paved roads is just so harsh in comparison. I'm finally getting a spare wheelset to run road tires on and, I'm getting 32's. Eff, aero, I'm not racing anyone.
Managed to fit 28s on my Giant defy 1 2014. Game changer, doesn't sound like much of a difference, but it was night and day. I was lucky enough to have a friend who lent me a set of swalbe winter 28 tyres (slightly knobbly) and figured if they'd fit most things would. Tolerances are tight, but I can still run them with my winter race blades. Measuring is a good first step, but borrowing a tyre if you can is always the best. That or check the returns policy of the store first 😅
Thank you Shane!! I wanted to go to 28mm 5000’s on my 21 internal for my tcr 2019. Life saver! Do you train with latex tubes, any issues with durability vs butyl
Continental tyres have always been oversized for their stated size. I use 28mm tyres on 21mm internal rims. You get less bulge in the tyre shape so they seem to handle better
Mr. Lama, I noticed at 2:55 that you have a little grommet where the front DR cable would normally exit the frame. Where did you get this? I changed my bike to DI2 and now have a hole there. Not great to keep the inside of the frame clean… Would appreciate some help to get rid of this problem I am having. Thanks! And great video as always.
Very interesting. I ride a 2018 Canyon Ultimate with a Zipp 404 Firecrest wheelset. 19mm internal. I ran 28mm GP5000 for about six months before changing back to 25mm GP5000. I honestly didn’t feel any difference and the 25mm fit better on the rim.
I have always run 28 mm Conti tires on my winter bike which have frequently measured 30 mm mounted. A recent addition to my stable is a CAAD13 which has loads of frame clearance... I'm running 27 mm Challenge Paris-Roubaix open tubular tires there that measure 30mm. But, on my summer bike I still run 25mm Conti's which measure 27mm when mounted. Latex tubes for the win!
If you ever switch to butyl, check out the extra light option of schwalbe. They come out at 75gr each and they save you the hassles of latex & thermoplastic
I'm running 28mm clincher GP5000 on Wheelsmith Aero45 carbon rims (17.25mm internal/27.5mm external) on my BMC Roadmachine 01 (2019) frame size 51. Loads of clearance. I'm one of those who would never go back to 25mm tyres
2016 TCR with R8000 Ultegra rim brakes with 28mm GP5000 clincher/latex tubes here. They measure 30mm wide on 21 internal width wheels. Got similar results to you with 3-4mm clearance all around. The closest point they get to the frame is art the rear behind the seat tube. Strangely to me the 28mm "feel" like they roll slower than the 25mm GP5000 I previously had on. Maybe it's because the 28s nullify the effect of the 105 rule? However they do feel slightly more cushioning and that's enough of a reason to keep them on.
Hey Shane, how did you end up getting on with those Hunt 40/50 wheels? Never saw a review video go up for those after the unboxing (maybe something to do with a global pandemic hitting, not quite sure 😉 )
The 4050 were/are a sold wheelset. The internal width on them was sold as being 21mm, but they measure 19mm. They since updated their website to list 19mm too. That was a bit of a surprise. I had some water ingress issues with them in really wet conditions too. Overall they performed well. I'd lean towards a true 21mm internal set of wheels now, the Scribe set that I have are this spec and ride nicely.
Got the same TCR bike as yourself, still on conti 25 TL with the stock SLR wheels. Not had any issues, may try 28's when these are worn out, but currently zwift isnt wearing them out being winter :) 80psi
Running gp5000 25mm front 28mm rear on 21mm internal 28mm external farsports feder. The front 25mm measures 26.3mm and the rear 28mm measures 27.6 so all in all well within the 105% rule
I ride 28mm GP5000TL, setup tubeless of course and they're amazing. Somehow they feel both faster and more comfortable than 25mm with tubes. I run 4 bar/60 psi, which about as high as tubeless should go in my opinion.
I recently swapped my 25mm to a 28mm (both conti5000) on the rear wheel only and didn't feel any difference in comfort or rolling resistance, though the back wheel felt a little more sluggish when accelerating and moving the bike form side to side while climbing out of the seat. Increase in rotational mass, I guess. Already used to it now.
If you think that resurface is poor come to Canberra - we call it Spray and Pray, because all they do is throw down the sticky stuff drop some rocks and walk away. Result is bike lanes full of loose stuff and getting hit with rocks for months afterwards.
It's not surprising the specialized 26mm tire is 1mm bigger. Modern tires (GP 5000, Shwalbe pro 1 addix) are sized to be true to size on modern wide rims, whereas old tires like the specialized are sized on the old mavic clincher rim (~15mm internal) Old 25 are the same casing as new 28.
I can tell you that Specialized Turbo 30mm do not fit my 2018 TCR Advanced with Elite wheels 50mm deep 27mm outer width rims. I thin the inner width is 19mm but I haven't physically measured them. I am about to go to Conti GP5000 28mm. Currently running Specialized espoir 25mm
Tyre size and compliance has only become a problem since discbikes came along. I ran 23 120 psi 25s 100 psi and 28s on my allez elite with 50 mm deep section rims (I couldn’t run a 28 in my synapse carbon) The difference was minimal on a rim brake bike. However I ran 23mm and 28s on a mates giant defy disc and specialized venge disc the difference was huge. The disc bikes seem to be stiffer and transmit road buzz far worse than rim bikes. The modern switch to make bikes more compliant seems to be a side effect of disc brake frames that never existed on rim brake bikes. So I can see how there’s sceptism out there. The industry has forgotten that you can also get phenomenal compliance from tubs as you can run them over a far wider pressure range 60 to 180 psi. I have ridden a cervelo s5 on 23mm tubs and 50 mm carbons that is as compliant as the defy on 28s. Tyre type, construction, rim depths and frame stiffness have a lot to add to the mix far more than size.
Slightly off topic but on the subject of Hunt and Giant wheels. Would HUNT 36 Carbon Wide Aero's be an upgrade on my 2018 Giant SLR1 Carbon 30's (rim brakes)?
Hey, am running the same bike,what did you conclude about the std wheel’s aero performance in windy weather and at speed ? I experience a bad wobble on a steep descent but had under inflated tires. Subsequently, I am noticing the wheels seem to grab a lot of wind at speed? Your thoughts ?
I have Hunt Aero 50s (rim) since June with GP5000 28mm clinchers. I have the oil slick spokes like your gravel chain & cassette, which look great. I had a speed wobble on an early descent but my main gripe in the 5000 logo is off centre to the Hunt logo 🤣
I'm guessing I weigh more than you (75kg) but I run my tyres at 70 psi. Would love to see you do a video on tyres with different tyre pressures and how that impacts performance/comfort. Also my 28mm tyres measure at 32mm wide. Wonder if that's changed with the latest GP 5000 clincher.
Still on Hunt wheels I see. I watched your review of Hunt wheels 3 years ago and bought a set. How did they do the last 3 years? I’ve had mine 6 months and were a great upgrade from my standard rims
I can confirm Hunt offer the best £/£ wheels. I have 3 sets 30mm carbon 1380g 50mm carbon 1480g Gravei 40mm Carbon 1580g All 20mm inner width except gravel at 23mm. All tubes less Conti 5000 25mm Schwabe Pro Ones 28mm and WTB 42mm Raddlers? All measure as per spec with digital gauge. 😉
How much is the clearance at your bike fork and chainstays? My bike is 25 tyre clearance rim brake Do you believe I have to forget about 28mm external rim and go down to 25mm width or norrower?
I ride a 2015 cervelo s5 with a 28mm gp5000 in the rear and 25mm in the front on 20mm internal rim width and 27 external both are tubeless and I could possibly go bigger on the front
Hi Shane, how do you compare the ride quality, handling and performance of the 28mm tubed Conti's and the 26mm tubeless Pirellies you recently installed?.
Using an Allen key to measure the clearance is absolutely awesome.
Fantastic tip for even working out what is possible!
As an owner of a 2019 TCR, thanks!!
My width measurements from previous studies on this...
With DT Swiss 18mm internal (hooked) rim:
- schwalbe pro one ‘28mm’ -> 29.2mm
- GP5000TL ‘32mm’ -> 30.5mm
- schwalbe g-one all round ‘38mm’ -> 38mm
- conti gp 4season ‘28mm’ -> 29.5mm (new)
With roval c38 (same as in your video)
- schwalbe pro one ‘28mm’ -> 30.5mm
- GP5000TL ‘32mm’ -> 31.8mm
- schwalbe g-one all round ‘38mm’ -> 40mm
- Conti Terra trail ‘40mm’ -> 39.5mm (when new)
- WTB Resolute ‘42mm’ -> 41.5mm (when new)
With light bicycle rim, 23mm internal (hooked)
- schwalbe pro one ‘28mm’ -> 31.5mm
- GP5000TL ‘32mm’ -> 32.9mm
Thanks for the info. Which Schwalbe Pro 1 did you test? I recently purchased a set of the new Addix compount in 28c to go on q 21mm internal width rim. I was feeling like maybe I should have gone up a size (30c), but according to your measurements it ballons a bit.
@@ayowser01 clearly the older one.
My new addix TLE version on 23mm internal width is narrower than that. I post the measurement in one of my reply in this video.
@@ayowser01 I'm running the pro one 30mm on the front and schwalbe one on the back because we have a flint problem on the local roads and the protection is better on the One
I have been using 28 tires for a few months and I must say that I am very happy.
I’ve been using 28 tubeless for two years. They’re really great.
We have customers coming to us fixated with running certain tire widths, this is a great video Shane as you have explained it all very well. Just because the box says 25 or 28mm it means nothing if you run different width rims. No tire width or pressure is perfect for everyone, it varies from rider to rider, weather, road surface, etc.
I will share this on our Facebook page. Love your work!
The reason the 28s didn't blow out completely when on the 21mm rims is that for each tyre/rim combo, there is the same amount of tyre for each test, so essentially you are "stretching" or "squeezing" the tyre on the different combos. The smaller internal rim width will yield a skinnier tyre, although normally a bit higher, and the wider rim then it becomes a bit flatter at the top and wider on the sides, but the tyre rim interface becomes a smoother transition. Hence why on the 17mm there was less space between the tyre and the seat tube. As for ride feel, horses for courses.
I run 28mm tubeless at the low end of the rated tire psi, this turns the road into butter for me. I can accelerate through train tracks while others pause, same with rough road surfaces. Overall a smoother and more confident ride. I do not race, Fondos and group rides only
I'm riding a 2019 TCR SL disc, size ML. I am running Vittoria Corsa 2.0 TLR 28mm tubeless at 70psi on 25mm internal WR65 Light Bicycle wheels. Width, as measured, is 30.9mm, so clearance is only 2mm at the chainstays. I have 5000km on this setup on Melbourne roads, mostly in the Dandenongs, no issues with getting anything caught between the tyre and frame. I only ride the TCR on sealed roads and on dry days, I ride my gravel bike when it's wet, or for mixed-terrain rides.
I'm glad I went for the 25 mm for my GP5000 on my TCR Rim 2020. 3mm clearence on the rear with a 19 wide rim is not something I feel comfortable with. Thank you for this video.
Hi. A bit late, but on my Specialized Venge, 2016, I use 25 mm GP5000. But need changing, punctures and waer. I use Campagnolo Vento, 700x22. 17 mm base width. I checked with the famous 3mm allen key, all clear, front and back. I use the continental butyl clinchers. So, will buy myself the 28mm GP5000 and I have at least an educated guess.
Thanks for running this experiment. Already interesting reading the comments. Thanks all!
Yup it fits. I've the exact same TCR as you and have been running 28C tire on Enve 4.5 AR Disc wheels with no issues. The internal rim width is 25mm and I have pleanty of clearance and haven't ever rubbed with Schwalbe Pro One Tubeless or Hutchinson Fusion 5 Galatik. Measured width with the Schwalbe and Enves are about 32mm once mounted.
A while back I tried 28mm GP4000SII tyres on my 2018 TCR Disc, hardly any room left (they ballooned up to well over 30mm, 19mm internal width rim) on the back. Good when it was dry but not in the wet.
They also felt too squisy and not direct enough. Went back to 25mm GP4000SII and after that to Speci Sworks Turbo 26mm (enormous improvement in grip)
On my winter bike (gravelbike, room isn't a problem there, 2.1" tyres even fit) I tried the 28mm Conti's, really didn't like them (same as on the TCR), for this winter I switched to 28mm Schwalbe One TLE on other rims (DT Swiss, 21mm internal), they blow up to well over 30mm (first install was under 30mm but after one ride they got a bit wider). I set them up tubeless an run 4-4.5bar of pressure (I'm 83kg heavy) and they feel absolutely great, lots and lots of grip, even in the wet and cold. They do feel a bit slower then the Speci 26mm tyres.
On the summer bike I have the faster 25mm Schwalbe Pro One TLE but haven't really ridden those, they come in at almost 28mm on my new carbon wheels (21mm internal)
I had a 2019 TCR rim brake bike - and always ran 30mm tyres - no problems!
Are you running SLR1 wheels? what brand tires are you using?
@@dukenstine CERO AR30 wheels, with Schwalbe Pro One tubeless.
I hate riding across resurfaced roads with all the rocks bouncing of the frame horrid noise and you know chips are happening. Nice to see tubes being used still 👍
Wicked Pissah Cool Video GPLama you’re roads are considered smooth as Silk compared to my Rough roads here in my home state of Massachusetts USA 🇺🇸 😁. I run 28’s on my Tarmac and loving them.
My findings. Giant TCR SL 2019. 28cGP5000TL on SLR 1. They inflate to around 28.5mm
Rear:
4.5mm - Chainstayy
10mm - Seattube
Front:
3mm - Fork
I will from now on be running GP5000 25c on the front and 28c on the back. For reference used to run 28c Schwalbe Pro Ones front and back but they inflated to around 27.5mm .
I have a Scott 56CM and run 28mm tyres. Clearance is more than 3mm and road feel for me being 100kg is way better than on 23mm tyres. The only issue I have in South Africa is sourcing the right size tubes. Lots of 18-25mm or 20-25mm and 35-45mm but not many suppliers carrying stock for 28mm (and then there is the valve length if you do manage to find a few boxes)
Thanks for another great video Shane
With wider internal rims, bigger tyres bulge less (light bulb shape), meaning instead of being round it sits flatter. so with tyre pressure it might just be an extra +/- 1mm on each sides like on the Roval. The wider bulge on both sides comes from using 28mm tyres on 17 internal or less, that means fat tyres, no aerodynamics, too cushy and greater chance of frame rub. so if you fit and 27mm external rim and internal 19-21 and they fit the frame, you have better chances of fitting 28mm easier.
Thanks for the video. I have exactly the same bike that you have except that mine is a large frame. I've been riding with the GP5000/28 for the last year and have not had any difficulty. I didn't check the clearance as closely as you did, but haven't noticed any issues with clearance at all. From the website on tire pressure, I see that I might be running too high a pressure, so I am going to try a lower pressure. Thanks again.
Thanks for the info!
I get this bike next month.
I happy because i know how much tire clearances.
thank you so much your videos!
More good stuff. Allen keys as feeler gauges is a solid concept. I have been here, done that myself. On my old Trek 5500 rim brake bike with Mavic Ksyrium's. Ran 25's in GP 4000's forever, then tried to move to 28's after a crash forced me into a new fork and front brake which resulted in much more room, at least up front. I still wasn't sure, especially at the back, so I bought a single 28 Gatorskin to test with, and it worked just fine. So I bought 28 GP 4000's, and DRAT!!! The rear was having none of this. Chainstays were locked solid! Even at only 55 psi! So I emailed Conti, and they suggested I try a Grand Prix 4 Season which worked. Now, I'm slow, old and fat, so not worried about them not being the top of the line speed tires. Moral to the story is not all 28"s are the same...
Contis GP4000 were notorious for running big with the 25s running at 28.5 and their speced 28s closer to 31-32. The newer GP5000 run true to the size so once you switching to them from the 4000s you might want to size it up. In other words GP4000 25 = GP5000 28 and GP4000 28 = GP5000 32 (almost)
DUDE, THANK YOU FOR THE REAL WORLD DATA ON THIS
TCR Advanced SL 2 KOM rim brakes with SLR 1 wheels 28mm Continental GP5000TL. The front tire has 3-4mm allen clearance (4mm slides through but rubs). Had a freak crash last November, went over the front end, on the flats. No idea what happened. Wondering if this might have caused the crash? I have not been back on the road yet, but started zwift, thanks Shane for all the info! Also, I noticed the rear tire of GP5000TL is already worn out after around 1500 miles. Considering swapping the front 28 to the rear and getting a smaller tire for the front. BTW, I tried schwalbe 28s and could not get them to seat on the SLR1 rims. The stock Giant Gavia 0 Tubeless, 700x25 tires are easy to get on and off the SLR1 rims and don't lose much pressure like the contis, but they are noticeably slow.
I’ve used the following on my TCR:
1. 28mm GP 4 Seasons with regular tubes
2. 25mm Michelin Pro4 endurance with regular tubes
3. 28mm GP5000TL
The most comfortable but most rolling resistance were the 4 seasons. I felt that they blew up like mtb tyres. As for performance, the Pro4s and GP5000s felt too similar to notice the difference, but the GP5000s were marginally more comfortable. I’ve settled on the 28mm GP5000s for winter and will switch to 25mm GP5000s for summer once the roads are cleaner.
Great video shane. Learnt 2 things by watching this 1) 28mm tyres will fit on my 2018 giant Tcr.
2) not much of a difference in ride quality over 25s to justify going up a size anyway.
Glad I watched this 👍
Continental reduced their tyre size from the gp4000 to gp5000.
My 25mm gp400 were really pushing front clearance on my 2016 rim brake Scott addict both on the top of the brake ridge (6800 callipers) and sides of the fork.
On the rear they fit no worries. By memory on my 21ish inner diameter alloy wheels these measured about 30mm! When I went to gp5000 25mm they measure around 27.5mm. Heaps of clearance on the back. Front passes 3mm Allen key test but probably couldn’t go much wider. Also on r8000 callipers now so brake clearance has been increased considerably.
Gp5000 are narrower for the same size than gp4000
I've gone from 25mm Vittoria Corsa with thin Specialized butyl tubes at about 90-95 psi, to 28mm Corsas with those Challenge latex tubes, at typically 75-80 psi. My experience is roughly yours. Yes, comfort has improved in my opinion, but nothing earth shattering. Also I live in Sweden, and we still have our fair share of silky smooth roads, so most of the time narrow high pressure tires work fine. On rare occasions when I end up on a gravel road with my road bike I definitely feel more secure on the 28s, though!
I'm running 30mm schwalbe on 20mm internal rims because I put them on for Flanders and PR sportives and can't be bothered dealing with dealing with tubeless sealent and the roads are getting worse since the virus.
I plenty of room on my Kinesis GF as I bought it as a winter bike with two major attributes. One titanium to deal with the winter salt on the roads and two long drop brakes so I could fit 25 or 28mm tyres with mudguards.
I always thought the internal rim width and the tyre size were the important parts to know.
well, now, keeping the external rim width almost flushed (105%) with the tyre for aero is the newest addition to the list of factors that I should be worried about 👍
From the horse's mouth so to speak ruclips.net/video/mDZ61aMegnQ/видео.html
I have Roval C38s and use 28c tyres with tubes. I have used the GP5000 and now trying the Pirelli P Zero Velo 4S..I have found the Pirelli a lot easier to get on and off the rim. After having 28s, I would not go back to 25s. They are more comfortable and provide a little more grip and confidence when cornering, especially in the wet. Have not noticed any perception of them being slower than 25s
I switched to 28 mm schwalbe pro one several years ago and these were actually 30mm when measured. I have Stans Avion and Grail rims which are 21mm wide and have now gone to schwalbe 30mm pro one on the front and schwalbe one on the back . Running at around 60 psi . Our local roads are rough so comfort is key. We have a lot of flints in the road so it's a chore to check the tyres before each ride and pull out the embedded teeth. I'm running tubeless so extra care is needed to make sure the sealant is still liquid in the tyre. The frame is a 2019 defy which has clearance for up to a 35mm tyre on the wide rims or 30mm tyre with mudguards. The local roads have seen off every kind of winter tyre from conti, pirelli goodyear and even marathon supreme. I'm sticking with the soft pro one for the grip but in 5 winter months there are dozens of small cuts all round the tyre so they will probably be retired early along time before they wear out.
Great news i have the tcr sl great bike with all fruit will be fiting 28 on thank you
Cheers peter perth
After checking out your tubeless vid Shane replaced the Cadex 26s for Schwalbe 28 Pro Ones on a 2021 TCR. Certainly more fiddling than tubes and took a while to seat but the soapy water tip saved the day. 😀Ride very nicely tho.
Kid crying at 11:58 made me hop off the trainer, assuming it was my own. Haha.
My 28mm Conti’s 4Seasons ballooned on my PR2’s to 31mm! Rode over new surface road and scratched my fork crown and stays/bottom bracket. Now I always use plenty of space! Sold that bike.
Thank you, was looking for this answer to install 28 conti 5000 on my tcr adv pro comp disk 2 2020 and now I'm 100% sure😁👍
For whatever reason, this just popped up on my suggested list. 2 years later I am still happy to say, why did we move to 28mm and disc brakes anyway? Nothing wrong with 23-25mm and rim brakes from just 2 or 3 years previous to this video!
Well i run tubulars, and run 25mm for a while but went back to 23mm, it just feels better when cornering, but that is hotmix not chipseal and not clinchers.
Shane is the Hunt Wheel Set is better than the SLR 1 Rims that I'm currently running?
That's a win! Looking to do the same so nice to get a gauge on the IRL height/width. More interested to see how they fitted on traditional ~18mm internal rim widths which are normally rated at 25mm max. Wonder if the tubeless 18mm internal vs 28mm TL tyre will cause bulging issues. GP5000/4000ii are the tyre of choice!
Lightbicycle AR56 wheels, the rim is 23mm internal, 30mm external. I ride specialsed Roubaix Pro 2Bliss tyre setup tubeless. Outer casing is 32mm but measures 35mm at 55 PSI
Comme toujours, superbe vidéo très bien documentée, Bravo !
2016 (?) Giant Defy SL 0 with Giant's SLR carbon rims. I changed from 23 to 25 (Conti 4000s) and now I'm on 28 mm Conti 5000 all with tubes. Going from the hard as a rock 23's to 25 and now 28's have all improved the ride, My tubeless Specialized Diverge gravel with the 42mm Pathfinders are very comfortable but more harder to push say over 16 MPH. Go big!
My 2018 Giant TCR Advanced SL rim brake runs Campy WTO 60 clincher wheelset (19mm internal rim width) with Pirelli P Zero 25mm tyres or Vittoria Corsa Graphene 2.0 25mm tyres...I am quite happy with 25mm tyres...
This is good to know thanks Shane...been thinking 28s on the 2020 tcr so this helps figure out the process
I appreciate the peanut butter comparison. Finally an analogy I can understand!
I ride on 23 mm tubulars on deep carbon wheels on the recently completed "world's longest bike path" here in Qatar. The roads are so rough from construction in most of the city, however, that I otherwise keep my road bike inside on the trainer unless I'm driving it to the track. The roads here require a gravel bike at least.
Interesting Shane! Suggestion for editing - it would have been nice to present a table of the inflated dimensions and difference before and after. Only 1.7mm taller means I might have to consider the 28s for my older bike, since 25mm GP5000s fit with a few mm to spare.
What pressure did you run each at? If you used 80psi for both as mentioned when checking dimensions, then no wonder you didn't see a ride comfort improvement. Maybe try them softer?
80psi was a baseline for the measurements only as an indication. 70/75 for riding... but that depends on rider weight/preference/etc.
2016 Giant Defy with 17mm internal rims. Running Roubaix pro clincher tyres in oddball 23/25 size at 95PSI. Tried same tyre in oddball 25/28 size with 70PSI and the ride was much smoother, so much so that it was even ok on gravel roads which the smaller tyres are most definitely not. I've also had some GP4000 II 25's on the rims and they are the same measured size as the 25/28 Roubaix tyres.
Good to see you didn’t have any issues fitting the GP5000’s. Read a lot of stuff online about them being tough to fit but guess it depends on the rims you have.
I found them real easy compared to other tubeless tires that I've put on.
@@michaelmechex I have some 25mm GP5000’s to put on some Giant SLR wheels so to see Shane not struggle encouraged me 😂
@@IanB17 To be honest, at first I struggled a lot, so I started googling, found and used this technique and it popped on pretty easily. www.roadbikerider.com/get-bike-tire-on-rim/
2017 Giant TCR SL (RIM😎) 2017 SLR1 rims, Schwalbe Pro 1 tubeless 25's, measures up as 28mm when fitted @90psi and runs great with plenty clearance 👍
17’ Giant TCR SL KOM rim ,thx for post!
@@chrislothes2254 i should add that i use the 2018 pro 1's, the new one's measure up more accurately.
I'm running Vittoria Corsa Control 28mm on my Pinarello F10, with a clearance of less than 2mm. That's not enough, and while I am concerned about debris getting between the tire and frame, it's rare enough that I'll risk it. So far after a month, no bad effects. Forgot to mention, the rim is 21mm internal. I need to measure the tire size and clearance after this month of riding just for reference. The ride is wonderful and fast! One thing to note; if you have a rapid flat, the tire will collapse and mushroom and it will end up rubbing the frame until you come to a stop, so for those of you with close clearance, be aware of this.
Switched from 25mm to 28mm in 2018 & won't go back down lower now.
I live and ride in London and the roads you are riding on look super smooth in comparison!
I am setting up a new Orbea OMX with 2020 Zipp 303 and Conti GP5000 28 mm clinchers with latex inner tubes. Frame is supposed to accommodate even larger tires so expect all A-OK. Waiting for the tires to be delivered --- expecting them to show up today. Zipp says the 303 rims are designed with 28 mm tires in mind for best aerodynamics.
As much as I loved the GP4000s tires in the past we have to get honest here: Continental has been *cutting corners* to achieve their tubeless tires!
The sidewalls aren't reinforced and their bead isn't hookless compatible. Essentially you're getting a normal tire that works with sealant. Many people on the forums and on Reddit have issues with these tires: damage on the fragile sidewalls runs them inoperable!
So *not* a proper tubeless tire!
Interesting....I only just started using my first ever GP4000S2 tyre that I bought on a clearance sale from Chain Reaction website about 3 years ago (last batch ever sold). I had only ridden them for ~1900km (with plenty of tread left) when I cut the sidewall (victim of Melbourne sealed road/bikepath pothole presumably). I will be interested to see if I can wear the 3 remaining tyres before the sidewalls are damaged....I have never failed a sidewall due to a cut before in 35 years of riding road bikes. The only other tyre sidewall I have damaged was a buldge in a heavily worn Vittoria Rubino Pro 3 but I was doing quite a bit of gravel riding so probably hit something hard etc
@@richardggeorge I have had 8 sets of 4000S tyres. I live in the Netherlands so the roads are 90% of the times almost perfect. I had two that I had to discard prematurely due to cuts in the side wall. And two that were already almost fully worn anyway.
Had 28mm GP5000 on SLR1 wheels on 2018 Rim brake TCR
I've got some 25mm internal width deep aero rim coming to take either 30-32mm tubeless tyres. I'm thinking of trying G One Speed tyres first. My bike is an adventure frame so can take 45mm 700C tyres.
I just purchased these exact tires for my 2019 Giant Propel Advanced Disc Pro with the SLR One wheel set planning to install in the next few weeks, thanks for the info
So, about a year ago my road bike frame cracked and I decided to replace it with a gravel bike. I've been riding a year now on 38mm semi-slick gravel tires on every ride, road or gravel and...I don't think I can ever switch back to 23mm tires. Even 23mm tubeless on the local paved roads is just so harsh in comparison. I'm finally getting a spare wheelset to run road tires on and, I'm getting 32's. Eff, aero, I'm not racing anyone.
Managed to fit 28s on my Giant defy 1 2014. Game changer, doesn't sound like much of a difference, but it was night and day.
I was lucky enough to have a friend who lent me a set of swalbe winter 28 tyres (slightly knobbly) and figured if they'd fit most things would. Tolerances are tight, but I can still run them with my winter race blades.
Measuring is a good first step, but borrowing a tyre if you can is always the best. That or check the returns policy of the store first 😅
Thank you Shane!! I wanted to go to 28mm 5000’s on my 21 internal for my tcr 2019. Life saver! Do you train with latex tubes, any issues with durability vs butyl
Continental tyres have always been oversized for their stated size. I use 28mm tyres on 21mm internal rims. You get less bulge in the tyre shape so they seem to handle better
Gp 5000 is different.
GP4000SII were oversized, GP5000/GP5000TL are much more true to size, GP5000TL measure up less than a mm bigger than GP4000SII in 23mm on my rims.
@@hectorkidds9840 tubeless are meant to sit tighter on the rim, that why they don't bulge
Did you use it on a TCR? What wheels?
Mr. Lama, I noticed at 2:55 that you have a little grommet where the front DR cable would normally exit the frame. Where did you get this? I changed my bike to DI2 and now have a hole there. Not great to keep the inside of the frame clean… Would appreciate some help to get rid of this problem I am having. Thanks! And great video as always.
Well spotted! This is Kintsuglue. It's magic stuff. Also sold as Sugru.
@@gplama thanks!
"Or those who treat the Saturday bunch ride like a one day classic..." HAHAHA
Very interesting. I ride a 2018 Canyon Ultimate with a Zipp 404 Firecrest wheelset. 19mm internal. I ran 28mm GP5000 for about six months before changing back to 25mm GP5000. I honestly didn’t feel any difference and the 25mm fit better on the rim.
Why did you change back?
@@crazytrutas honestly because the TDF cream wall ones came out in 25mm only. The GP5000 25mm also sat better and didn’t bulge out.
Appreciate the video as I am also considering going from 25s to 28s. Have I missed something, why aren’t you using tubeless?
I have always run 28 mm Conti tires on my winter bike which have frequently measured 30 mm mounted. A recent addition to my stable is a CAAD13 which has loads of frame clearance... I'm running 27 mm Challenge Paris-Roubaix open tubular tires there that measure 30mm. But, on my summer bike I still run 25mm Conti's which measure 27mm when mounted. Latex tubes for the win!
If you ever switch to butyl, check out the extra light option of schwalbe. They come out at 75gr each and they save you the hassles of latex & thermoplastic
I'm running 28mm clincher GP5000 on Wheelsmith Aero45 carbon rims (17.25mm internal/27.5mm external) on my BMC Roadmachine 01 (2019) frame size 51. Loads of clearance. I'm one of those who would never go back to 25mm tyres
it might work but minimum is 21mm internal for 28mm tyres
2016 TCR with R8000 Ultegra rim brakes with 28mm GP5000 clincher/latex tubes here. They measure 30mm wide on 21 internal width wheels. Got similar results to you with 3-4mm clearance all around. The closest point they get to the frame is art the rear behind the seat tube. Strangely to me the 28mm "feel" like they roll slower than the 25mm GP5000 I previously had on. Maybe it's because the 28s nullify the effect of the 105 rule? However they do feel slightly more cushioning and that's enough of a reason to keep them on.
Hey Shane, how did you end up getting on with those Hunt 40/50 wheels? Never saw a review video go up for those after the unboxing (maybe something to do with a global pandemic hitting, not quite sure 😉 )
The 4050 were/are a sold wheelset. The internal width on them was sold as being 21mm, but they measure 19mm. They since updated their website to list 19mm too. That was a bit of a surprise. I had some water ingress issues with them in really wet conditions too. Overall they performed well. I'd lean towards a true 21mm internal set of wheels now, the Scribe set that I have are this spec and ride nicely.
Got the same TCR bike as yourself, still on conti 25 TL with the stock SLR wheels. Not had any issues, may try 28's when these are worn out, but currently zwift isnt wearing them out being winter :) 80psi
Running gp5000 25mm front 28mm rear on 21mm internal 28mm external farsports feder. The front 25mm measures 26.3mm and the rear 28mm measures 27.6 so all in all well within the 105% rule
I ride 28mm GP5000TL, setup tubeless of course and they're amazing. Somehow they feel both faster and more comfortable than 25mm with tubes. I run 4 bar/60 psi, which about as high as tubeless should go in my opinion.
Hi Shane, what do you estimate Conti’s GP5000 28 width & height would be for 24 internal width wheel (hooked)? thanks!
Top tips Shane.👍
2019 TCR SL Disc - 21mm internal farsports wheels, 28mm GP5000TL and most importantly CRUNCHY peanut butter always
What brand of valve extenders are those? Its hard to find short stubby ones. That rule of 105% is new to me, but a good one
Also interested in this, I am trying to find a reliable latex tube/extender combo for 55mm deep wheels running 28mm tyres
I recently swapped my 25mm to a 28mm (both conti5000) on the rear wheel only and didn't feel any difference in comfort or rolling resistance, though the back wheel felt a little more sluggish when accelerating and moving the bike form side to side while climbing out of the seat. Increase in rotational mass, I guess. Already used to it now.
What size do the 25mm tyres measure on the Hunts and C38?
If you think that resurface is poor come to Canberra - we call it Spray and Pray, because all they do is throw down the sticky stuff drop some rocks and walk away. Result is bike lanes full of loose stuff and getting hit with rocks for months afterwards.
I have just changed from 32’s to 28’s on my Defy. Looking forward to see the difference tomorrow.
It's not surprising the specialized 26mm tire is 1mm bigger. Modern tires (GP 5000, Shwalbe pro 1 addix) are sized to be true to size on modern wide rims, whereas old tires like the specialized are sized on the old mavic clincher rim (~15mm internal)
Old 25 are the same casing as new 28.
Great videos; My Trek Domane has 35mm clearance and for me looks pretty tight, 28mm is the narrowest Id ride because 25s feels like a horse carriage
I can tell you that Specialized Turbo 30mm do not fit my 2018 TCR Advanced with Elite wheels 50mm deep 27mm outer width rims. I thin the inner width is 19mm but I haven't physically measured them. I am about to go to Conti GP5000 28mm. Currently running Specialized espoir 25mm
Tyre size and compliance has only become a problem since discbikes came along. I ran 23 120 psi 25s 100 psi and 28s on my allez elite with 50 mm deep section rims (I couldn’t run a 28 in my synapse carbon) The difference was minimal on a rim brake bike. However I ran 23mm and 28s on a mates giant defy disc and specialized venge disc the difference was huge. The disc bikes seem to be stiffer and transmit road buzz far worse than rim bikes. The modern switch to make bikes more compliant seems to be a side effect of disc brake frames that never existed on rim brake bikes. So I can see how there’s sceptism out there. The industry has forgotten that you can also get phenomenal compliance from tubs as you can run them over a far wider pressure range 60 to 180 psi. I have ridden a cervelo s5 on 23mm tubs and 50 mm carbons that is as compliant as the defy on 28s. Tyre type, construction, rim depths and frame stiffness have a lot to add to the mix far more than size.
Slightly off topic but on the subject of Hunt and Giant wheels. Would HUNT 36 Carbon Wide Aero's be an upgrade on my 2018 Giant SLR1 Carbon 30's (rim brakes)?
Hey, am running the same bike,what did you conclude about the std wheel’s aero performance in windy weather and at speed ? I experience a bad wobble on a steep descent but had under inflated tires. Subsequently, I am noticing the wheels seem to grab a lot of wind at speed? Your thoughts ?
No issues for me. This can be quite subjective depending on your weight, position, riding style, etc.
I have Hunt Aero 50s (rim) since June with GP5000 28mm clinchers. I have the oil slick spokes like your gravel chain & cassette, which look great. I had a speed wobble on an early descent but my main gripe in the 5000 logo is off centre to the Hunt logo 🤣
I'm guessing I weigh more than you (75kg) but I run my tyres at 70 psi. Would love to see you do a video on tyres with different tyre pressures and how that impacts performance/comfort. Also my 28mm tyres measure at 32mm wide. Wonder if that's changed with the latest GP 5000 clincher.
Put some 28 mm Pirelli P Zero Velo 4S on my Giant TCR SL 1 2019 disc. Gold! I'll never go back to those Contis. 4S were great, after that, potatoes
S-Works Tarmac SL6 disc (2019 model), Roval Alpinist CL (21mm internal Width), Schwalbe Pro One 28mm: Check
Still on Hunt wheels I see. I watched your review of Hunt wheels 3 years ago and bought a set. How did they do the last 3 years? I’ve had mine 6 months and were a great upgrade from my standard rims
I can confirm Hunt offer the best £/£ wheels. I have 3 sets
30mm carbon 1380g
50mm carbon 1480g
Gravei 40mm Carbon 1580g
All 20mm inner width except gravel at 23mm. All tubes less Conti 5000 25mm Schwabe Pro Ones 28mm and WTB 42mm Raddlers? All measure as per spec with digital gauge. 😉
Hey, thanks for the video. I can add that on the Giant Propel Advanced 2 Disc 2019 also do fit 28tyres ( Continental 4 Seasons and GP5000 )
How much is the clearance at your bike fork and chainstays?
My bike is 25 tyre clearance rim brake
Do you believe I have to forget about 28mm external rim and go down to 25mm width or norrower?
I ride a 2015 cervelo s5 with a 28mm gp5000 in the rear and 25mm in the front on 20mm internal rim width and 27 external both are tubeless and I could possibly go bigger on the front
S-Works Tarmac SL6 with 28 GP5000 tubeless works great. Trying the Schwalbe 30 next.
Hi Shane, how do you compare the ride quality, handling and performance of the 28mm tubed Conti's and the 26mm tubeless Pirellies you recently installed?.
I’ll need a lot more kms on the 28s to really know. I’m on the case! :)
Hi, how about 28mm tyres with 23mm outer width clincher rims?? It is suitable or have any disadvantages?