@@256shadesofgrey The chainline would be so horrible with 75/52 that I'm not sure you would be even able to shift into that gear unless you would have EXTREMELY long chainstays.
A big chainring needs a casette with a big range too, i actual have a small 70 tooth chainring with 11-52 casette, i change the chainring soon to an 80 tooth 🤪
Longer crank increases the circumference of your pedal stroke, reducing the number of revolutions for a given time period. Also closes the hip angle compared to shorter cranks. Shorter cranks allow for higher cadence, thus having the effect of a lower gear ratio in terms of how much stress is put on your muscles. A longer crank helps when you need torque to loosen the crank bolt.
So the ideal setup for this front ring would really be a MTB cassette with large uphill rings aswell as small rings, a road cassette is pointless with any incline. It would be great on a recumbent where aero drag is much less.
That sounds ridiculous and fun. 75-52 ratio isn't all that bad, all things considered, and you still get the 75-11 or 75-10 for top speed! That said you're still going to feel quite a bit more resistance with having to haul that enormous amount of chain up and over such a huge ring, but hey, it'll look wild. :P
The ideal placement for this chainring is alluded to at 03:45 - on a small wheeled bike like a folder or recumbent to offset the lower final drive ratio.
Really enjoyed the format and structure of this video (both lads working together in the workshop overcoming challenges, less presentational at times etc.) so hope this style comes back again!
I see potential for an even bigger chainring. I'm thinking, compound gear systems! Where the pedals are connected to a smaller internal gear that drives the large outer chainring. Getting a torque multiplication effect, making it easier to turn the large chainring and allowing for an even bigger blade!
If you use an underdrive gearbox to drive the big chainring, what would the beg chainring be for!? 😅 But yes, you can use a Schlumpf Mountain Drive for that. It's a small gearbox that sits between the cranks and the chainwheel. It has a direct 1:1 speed and a reduced 2.5:1 speed. (Other models are Speed Drive and High Speed Drive with 1:1.65 or 1:2.5 overdrive.) With the Mountain Drive you can use a large chainring for fast riding and still have easier speeds available for uphills. 75:2.5 is 30, so the resulting speeds are really quite manageable. Schlumpf Drives are well known in the recumbent community. (Our cycles, especially the velomobiles are often fast in the flats, but heavy uphill. Normal shifting systems often don't have enough gear range for that.)
Great vid! I used to have a 61 tooth chainring on my bike. Impractical but got some funny looks and comments. Doing 20mph in first gear was always interesting.
The 75 tooth chainring would give you an advantage in many Strava downhill segments. But how do you get up the mountain? You would need a small 60 chainring and a classified hub gear, although the large chainring does not have a climbing rivet for the chain. Then you would have 48 gears.
Since you wrote HPV, was this in a streamliner or velomobil? How long did you hold this speed? If I remember correctly, there was a one hour record with about this speed. Am I right?
@@LaomerKedor , it is a streamliner. it is an “ upright “ or normal bike position. the speed I quoted is for the flying 200 metres. my hour speed was about 40+ miles an hour at the time. now, recumbent hpv’s are dramatically faster than this. ( I haven’t checked lately)
Actually, one of these with a MTB 10-51 cassette at the back would be pretty decent. The climbing gear would still be 1.5, but its not that in the grand scheme of things. Actually better than 39-25 people were running not long ago. And a 75-10 would keep up with highway traffic
the 75-10 doesn't make you any faster - and for sure not to the speed of high way traffic. Humans simply don't have the power to use them. For 100 kph you need 4000-5000 W (depending on how aero you are); and even in a steep downhill... when you would reach 96 kph freewheeling you would need about 400 W to reach 100 kph. Makes no sense at all
@@l.d.t.6327 Thanks for the heads up. Saw an example here in RUclips. As far I remember this guy in Brazil use a "conventional" setting with one giant chain ring.
I had a 75 on my Brompton which was originally for a recumbent bike. I did race with a 70t in the world Brompton Championships. And on a visit to Royce Engineering Cliff had a 144t chainring.
I'm turning my gravel bike into a more-of a road bike. I still really enjoy the 1x system, and there are no hills THAT crazy in my city. I'm going from a 40t chainring / 11-42t cassette to a 44t chainring / 11-36t cassette. If ever I come to an ascent I can't manage - I'm 110% certain this video will pop-up in my head.
I remember back in the eighties when Dave Legrys attempted the landspeed record. His chainring was much bigger and he needed a Rover 3.5l to drag him up to speed. He actually used a section of motorway to do it on. We also had big chainrings on some of the club (Harlow CC) roller bikes.
Thanks for doing this!! I'm older and dealing with some health issues and there is a possible use case for a larger chain ring in some situations. In the USA we have more space and much more lenient enforcement of E Bike class rules especially in the suburbs and country roads. I like to pedal hard with assistance and since it's hot where I'm at, I could use a slightly taller (larger) front chain ring. But your test shows that there's a point of diminishing returns dealing with wind. So thanks again for doing this. Based on your experiment I'd probably add just 2 or 4 teeth to the front ring.👌🏻👍
You are very correct, it's very simply a bigger lever, which will make it easier to get going. Imagine trying to get this going with smaller cranks, you could almost mount a pedal on the side of that chain ring :D.
Itb is interesting that as the diameter of a chainring increases, the force on the chain links diminishes, thereby reducing frictional losses in the chain. Time to take this bike to the Silverstone rig to measure the savings! Recumbent enthusiasts and engineers realized the advantages of large rings along time ago and have favoured this approach when designing HPVs intended to reach speeds as high as 130 kph. 75 teeth is actually way too small for a fully faired HPV, but it would work well for an unfaired recumbent. I will be using a similar sized ring on my new unfaired recumbent TT bike next spring.
My Di2 gears packed in due to extreme heat over in Mallorca one year, locking me in the 52/11…! I had to get from Over Murro back to Palma Nova😂 I looked just like Olly on the flat, and i kind of got into it as you just batter on with what you’ve got😳😂 Then came the climbs and the weaving around, just crazy and my legs were over due to explode and minute. I remembered a bike shop on the edge of Palma and begged them to help me out as bigger climbs were afoot to get home. They kindly stripped out the wires, found no faults, put it back together and it just started up working again!! Defo the heat i think. Got back home ok but it then packed up again a few days later. I cooled off the bike in an air conditioned sympathetic garage and hey presto it worked again!! It was around 34 degrees and would be hotter inside the frame i guess with the sun beating down. Have you ever had this with Di2? It was Dura ace 3rd gen woth the clever battery. Cheers.
There was a guy - Nic Bowdler - who used a TT bike with a 77T chainring. I remember him passing me on the Bentley course (I think it was a 50) like some sort of stealth weapon.
I was at a ski resort yesterday with a lot of MTB off-road downhillers around. The bikes, however, all seem to be geared for extreme climbing. One of those rear cassetes with the huge low gear cog would be interesting with this chainring. You’d need the second chain for sure though.
drop down to a 61/57T. Also upgrade the rear derailleur with a 11-46T if using the 75T front Chainring. This should make up for the easy to pedal feel and speed. Larger front Chainrings is only beneficial if used correctly with gear selection of the rear cogs or going downhill. If you're on a flat surface then selection of the rear cog should be somewhere between 16-23T (comfort). And if you want to speed then 11T rear cog preferably. If your quads is capable of handling the harder Candence.
Worthy test for every future GCN presenter. Makes me glad don't live anywhere near you, though I felt like I attempted a similar challenge on the hills above Oakland California near San Francisco.
I think 54 tooth chainring its like the optimal for a road bike, more than that, it starts to turn into track bike, but you dont have climbs, traffic, and so
My road bike has double 54t/42t chainrings and 11t-34t rear rings, which is more than enough for me, and I've never run out of rings on either side. Chainrings with 75t are only for making fun videos like this.
I run a 52 -14 on my track bike, 54- 16 on my FIXEDGEAR, and a 2x with a 56 chainring and a 9 speed cassette with a 11-23. If you ruñ shorter than what you normally run it will work. Nice you figured out the clearance. 🌀🌀🌀
I have current upped my gearing to 53t and the speed gain ( maybe it’s a placebo effect ) on the flat is amazing 🤘🏾🤘🏾 I did see a 54t DA on a website for sale and was thinking about bidding for it but changed my mind last minute and say maybe 53 is good instead of going crazy lol
I can imagine that the chainring might suit a single speed/fixed gear providing you also increase your sprocket size - a 50/16 up to 75/24 - same gear inches but less tight articulation thus saving watts. It would look bonkers though. Or maybe it is used on a recumbent which due to much lower drag can require bigger gears.
Dr. Bridgewood was so right about "some niche applications" to exist. This video is living proof that at least one application exists. It unequivocally proves that the statement "not all heroes are idiots" is fully reciprocal.
I use a 75-tooth and Schlumpf Mountain Drive (2.5 reduction in low range) with an 11-50, 10-speed cassette on my velomobile. It allows cruising at 55-60km/h on flat ground and 80-90km/h on the downhills.
I would love to see them do this again but paired with Shimano’s gravel cassette and derailleur, or better still on a bike with Drivelines 75 tooth chainring, paired up with SRAMs AXS shifters up front and Eagle AXS rear derailleur and cassette, to give a 50-10 rear cassette (assuming they were compatible - I confess I’ve not looked at the compatibility with the chainring and SRAM). See Ollie’s match stick legs power up that hill with a bigger bailout gear!
There is nothing new under the sun. TA did a 68 tooth chainring back in the early 60s. I rode up and down all the big hills in Bath with a 23t largest sprocket. I glazed the Mafac brake blocks coming down Wellsway. Toe clips and straps of course. I was only 17.
3:15 in fact the opposite is true, having longer cranks gives you more leverage and thus an effectively lower gearing. imagine going down hill with the 75t chainring with 165mm cranks, you would be able spin faster than with 180mm cranks. LONGER cranks means LOWER gearing. so for the purpose of this video, the 180mm cranks actually does't make a lot of sense.
The biggest chainring I ever used was on a 105km tandem record ride that included 1000m of altitude lose and a 60kmh tailwind, and that was a 64t ring running onto a 13t smallest sprocket.
I have the 69T version of that chainring. I cut shift ramps and added shift pins to it and made a 52-58-69 triple. Moved the FD up and trimmed the cage to shape. Rear is 7 speed 14-28. 8 speed chain. Big ring shifts perfectly.
@@pierrex3226 I couldn’t get past 60km/h with the 52T and 14 sprocket and I had custom painted the bike frame, wheel rims and hubs so I wanted to keep the wheels. Easiest solution was to put on a bigger chainring.
Makes me think about this new aero bike by decathlon that came with a 52/39 in the front (too much for most average joes here in the German Mountains I'd boldly assume), but then had a humongous 11-34 cassette in the back to equal it out.
Yeah that's a monster. And yeah, it was fun to watch. Some world tour riders could find a legit use for it, certainly. Not me, I'd enter cardiac arrest.
Still glad i got 2 x gears on my Gravely commute bike. Small gaps between gears so you can find the comfy one for the slope you're on. Lowest gears low enough. And If i'm going fast enough for my high gear to topped out i'm going fast enough
That chainring was probably designed for a custom made recumbent that is enclosed that will allow a rider to hit 130-160km/h because of little drag and wind resistance.
That's my fixed gear setup, 75 - 11, I take the Highway to work. On the weekends I win hillclimbing competitions with this setup. The only thing that is hard with this gearing is to resist the temptation to put an even bigger gear on.
Would be cool to see the result of an inverted experience : a very small and tiny front chainring (10-15 tooth) combined with a super big cassette. Take then the bike to super steep climbs.
I would think making the chain smaller would enable the whole system to be lighter & more efficient. Not sure if it’s been tried, but I would guess the improvements in modern materials would make it possible.
On my eBike#2 I run a 48 front and 11 rear and could use bigger in front at over 30mph ... Starts getting close to the ground though. Then with a 20 inch rear wheel on my recumbent some taller gears could be used.
Maybe on a tandem track bike…. A friend of mine raced (just once!) with a Sugino 64T. Just didn’t work. Also the leverage (Q-factor?) of the pedal spindle to to chain means your pulling a lot of leverage.
75-16 is the same as 52-11 and 75-32 is the nearly the same as 52-22 & 36-15 which I often use for quick-enough take-offs from red lights or quick scrambles up short but steep knolls. I’d actually like 1x with a 75t ring for commuting at walking pace cadences, if only they did them in a nice DA Track style svelte archway design instead of just a bulky plate with teeth.
I have ridden with a 56T chainring for a year now on my TRIBAN RC500 road bike with SHIMANO SORA groupset, and was able to achieve faster speeds than you have on the 75T chainring. For me, a 56T is enough! Kudos to ROTOR by the way, which also produces monstrous chainrings - I mean the sizes are still within limits.
This would be great on an e-bike with high torque motor. You could set it at one gear and use the motor assist levels as your “gears”! Uphill and down on the one gear! Superb!!!
I am putting this exact chainring (I already have it) on a Billy Goat V3 that is arriving at my home later this week. The issue with that bike is spinning out because of how fast it goes. I want a bike that doesn't spin out at top speeds.
my ebike is so fast the gearing it came with is useless at top speeds, with a chainring like this i could be able to contribute at the top end :+D amazing video !!
Sally in the Woods??.....I've got a "haunted" road like that, that was on the route of a fast group ride that I used to do. Its name was Munger Road. Somebody even made a movie about the legend, with its name ("Munger Road"). They even used the railroad crossing as part of the movie. Maybe it was haunted. One guy went down hard, after hopping the tracks, at speed. The speed test achieved only 44 to 45 mph. I can spin a 53x12 at 130 rpm, that fast.
...last time I made 74km/h (downhill of course xD) on my 50x11 tiagra on Giant TCR and I was spinning like crazy I'm 100% sure that its easier to spin crazy fast for longer than spin hard btw love your channel and greetings from Poland!
Dig out your hour record bike and put on that if your track crankset has the correct BCD. Back to the velodrome and give it a go. Not another hour mind you but some shorter efforts, maybe 10-15 minutes? Even a roller session in the pit to warm up would be interesting.
Would you try riding with a 75-tooth chainring? Or is it just too extreme?
Put a 9-52 MTB cassette on it. 75/9 sounds like fun, while 75/52 will be close to what you have for a climb gear on road bikes anyway.
Could be good on an e-bike. I don't really use my 53-11 so a 75 is too much for me on a normal road bike.
You guys should try that chainring on an electric road bike
@@256shadesofgrey The chainline would be so horrible with 75/52 that I'm not sure you would be even able to shift into that gear unless you would have EXTREMELY long chainstays.
A big chainring needs a casette with a big range too, i actual have a small 70 tooth chainring with 11-52 casette, i change the chainring soon to an 80 tooth 🤪
That's not a chain ring, that's a table saw blade!
don't give em ideas 😂
As long as it’s 3/32, 😂
Or a miter saw blade...😅
Ur dumb
put a 52teeth casset on it
A longer crank should reduce your effective gearing, not the other way round
yep, and a guy with a phd in chemistry should know that. But I guess thats what happens when you have to work and talk at the same time.
@@bergerniklas6647 chemistry has nothing to do with physics, I liked physics way more than chemistry and don't know shit about chemistry either
yes, mechanical advantage
Came here to say that.
Longer crank increases the circumference of your pedal stroke, reducing the number of revolutions for a given time period. Also closes the hip angle compared to shorter cranks. Shorter cranks allow for higher cadence, thus having the effect of a lower gear ratio in terms of how much stress is put on your muscles. A longer crank helps when you need torque to loosen the crank bolt.
So the ideal setup for this front ring would really be a MTB cassette with large uphill rings aswell as small rings, a road cassette is pointless with any incline. It would be great on a recumbent where aero drag is much less.
That sounds ridiculous and fun. 75-52 ratio isn't all that bad, all things considered, and you still get the 75-11 or 75-10 for top speed!
That said you're still going to feel quite a bit more resistance with having to haul that enormous amount of chain up and over such a huge ring, but hey, it'll look wild. :P
The ideal placement for this chainring is alluded to at 03:45 - on a small wheeled bike like a folder or recumbent to offset the lower final drive ratio.
I wanna see Feather vs Holmes on that climb with the same setup.
Also, +1 to all those people suggesting they try it with a crazy 50t MTB cassette
Such chainrings are useful for small wheeled bike - like folding bikes or recumbents.
Yes definetly
Oh, you're active. Waiting for new videos!
Unless the wheels are so small the CR drags on the ground.
At that point, that chainring is a third wheel :D
I'm thinking to put on folding bike so be 32.4mph estimate top speed I go, might make single speed depending on where cycle as only need 75-11
Love the setting which like in a sit com type of vibes. Really loved it! Maybe try racing the rig to local criterium race?
Yes, they need to race it
Got to appreciate Alex embracing the 'I've got Dura-Ace chainsets coming out of my ears' meme 🤣
Alex comment about Dura Ace cranks was funny AF. If you know, you know
😂😂😂
I know 😅
Was looking for this comment as soon as he said he's got em coming out of his ears
I don't know please explain
@@oblimidon There was a video where he put an old dura ace crankset on his bike for a budget video saying it was only like 100 dollars or something.
Really enjoyed the format and structure of this video (both lads working together in the workshop overcoming challenges, less presentational at times etc.) so hope this style comes back again!
.
*"You know who's going to hack this...
*...ebikers with hub motors.*
*"But officer, I was going 75 in eco mode.*
to be frank, mid-motor ebikes also accept these chainrings :) mine is actually 110 bcd 5 bolt.
I see potential for an even bigger chainring. I'm thinking, compound gear systems! Where the pedals are connected to a smaller internal gear that drives the large outer chainring. Getting a torque multiplication effect, making it easier to turn the large chainring and allowing for an even bigger blade!
They do that for the speed records, basically two chains
One velomobilist in my strava feed has an 80 tooth chainring.
If you use an underdrive gearbox to drive the big chainring, what would the beg chainring be for!? 😅 But yes, you can use a Schlumpf Mountain Drive for that. It's a small gearbox that sits between the cranks and the chainwheel. It has a direct 1:1 speed and a reduced 2.5:1 speed. (Other models are Speed Drive and High Speed Drive with 1:1.65 or 1:2.5 overdrive.) With the Mountain Drive you can use a large chainring for fast riding and still have easier speeds available for uphills. 75:2.5 is 30, so the resulting speeds are really quite manageable. Schlumpf Drives are well known in the recumbent community. (Our cycles, especially the velomobiles are often fast in the flats, but heavy uphill. Normal shifting systems often don't have enough gear range for that.)
Theres a London cyclist on Strava called "Mean Cycling" he rides this exact crank pretty much on a daily basis and hes fast!!
2:37 No, he said bolt hole, kids!
lmaooooo unfortunate accent for that word
boat hole?
@@manoz6194 Boat hoe. (It's for gardening on a fancy yacht.)
Great vid!
I used to have a 61 tooth chainring on my bike. Impractical but got some funny looks and comments.
Doing 20mph in first gear was always interesting.
The 75 tooth chainring would give you an advantage in many Strava downhill segments. But how do you get up the mountain? You would need a small 60 chainring and a classified hub gear, although the large chainring does not have a climbing rivet for the chain.
Then you would have 48 gears.
Mountains up by bus 😂
The good old pushing the bike
Just start a the top of a hill and drive down fast enough that you roll up the next hill.
I think I saw Alex and Ollie going up Bathford Hill to do Prospect Place as I was going down and now I know why Ollie looked really grumpy!
on my Alex Moulton bicycle, I used a 60 tooth for general training, and for my world record HPV (51.3 mph-82.5 kph) I used an 86 tooth chaining
Did you now?
Since you wrote HPV, was this in a streamliner or velomobil? How long did you hold this speed? If I remember correctly, there was a one hour record with about this speed. Am I right?
@@LaomerKedor , it is a streamliner. it is an “ upright “ or normal bike position. the speed I quoted is for the flying 200 metres. my hour speed was about 40+ miles an hour at the time. now, recumbent hpv’s are dramatically faster than this. ( I haven’t checked lately)
Actually, one of these with a MTB 10-51 cassette at the back would be pretty decent. The climbing gear would still be 1.5, but its not that in the grand scheme of things. Actually better than 39-25 people were running not long ago. And a 75-10 would keep up with highway traffic
How my TT is set up, though with a smaller CNC’d 61T…
Yeah i would probably put this on my mtb if it would fit.😀
So realistically would probably have to use gravel/road bike with mtb casette to make it fit.
the 75-10 doesn't make you any faster - and for sure not to the speed of high way traffic. Humans simply don't have the power to use them. For 100 kph you need 4000-5000 W (depending on how aero you are); and even in a steep downhill... when you would reach 96 kph freewheeling you would need about 400 W to reach 100 kph. Makes no sense at all
@@fiddleronthebike ackschually
A guy in Brazil used a 100+ chain ring in his bike when breaking the speed record in a road with the help of a wind shield behind a car.
Those guys usually use 3 chainrings in front: a very big one, a small one connected to another big one and next the cassette.
@@l.d.t.6327 Thanks for the heads up. Saw an example here in RUclips. As far I remember this guy in Brazil use a "conventional" setting with one giant chain ring.
Love the style of this vid guys.. just two mates playing with bikes and parts in the garage.. then trying them out.. classic.. Pete 🚴♀️🚴🏻👍
Good silly fun with a sensible conclusion at the end. Nice work chaps!
I had a 75 on my Brompton which was originally for a recumbent bike. I did race with a 70t in the world Brompton Championships. And on a visit to Royce Engineering Cliff had a 144t chainring.
I know people who drive such rings on very fast velomobiles. You can make 2x with hand-shifter, just tipping the chain down to the smaller one.
I'm turning my gravel bike into a more-of a road bike. I still really enjoy the 1x system, and there are no hills THAT crazy in my city. I'm going from a 40t chainring / 11-42t cassette to a 44t chainring / 11-36t cassette. If ever I come to an ascent I can't manage - I'm 110% certain this video will pop-up in my head.
I remember back in the eighties when Dave Legrys attempted the landspeed record. His chainring was much bigger and he needed a Rover 3.5l to drag him up to speed. He actually used a section of motorway to do it on. We also had big chainrings on some of the club (Harlow CC) roller bikes.
That is Bike Vault material. Ring da Bell 🔔
I'd like to see the bodybuilder guy you used on an earlier video try it or even Ganna.
Thanks for doing this!! I'm older and dealing with some health issues and there is a possible use case for a larger chain ring in some situations. In the USA we have more space and much more lenient enforcement of E Bike class rules especially in the suburbs and country roads. I like to pedal hard with assistance and since it's hot where I'm at, I could use a slightly taller (larger) front chain ring. But your test shows that there's a point of diminishing returns dealing with wind. So thanks again for doing this. Based on your experiment I'd probably add just 2 or 4 teeth to the front ring.👌🏻👍
wouldn't longer cranks give you lower gear? they give you more torque so you can push the pedals more easily but you lose a bit of speed
@@alf3071 yes
They actually used longer crank, considering height of the rider.
Yes. He has more torque, dont know what he was on about
You are very correct, it's very simply a bigger lever, which will make it easier to get going. Imagine trying to get this going with smaller cranks, you could almost mount a pedal on the side of that chain ring :D.
Itb is interesting that as the diameter of a chainring increases, the force on the chain links diminishes, thereby reducing frictional losses in the chain. Time to take this bike to the Silverstone rig to measure the savings! Recumbent enthusiasts and engineers realized the advantages of large rings along time ago and have favoured this approach when designing HPVs intended to reach speeds as high as 130 kph. 75 teeth is actually way too small for a fully faired HPV, but it would work well for an unfaired recumbent. I will be using a similar sized ring on my new unfaired recumbent TT bike next spring.
What rings do they ride on the track? There are some big lads with quads like tree trunks.
Btw 75T with 11T at 90rpm with 28C tire is 78km/h. and at 130rpm that is 113km/h only if you have the power to do that.
I imagine, if it is on the flat, at 113km/h either the rear tire doesn't generate enough traction or the front wheel looses contact with the road.
Glad that your knees survived the climb. Great to see dura-ace cranks make an appearance
My Di2 gears packed in due to extreme heat over in Mallorca one year, locking me in the 52/11…! I had to get from Over Murro back to Palma Nova😂 I looked just like Olly on the flat, and i kind of got into it as you just batter on with what you’ve got😳😂 Then came the climbs and the weaving around, just crazy and my legs were over due to explode and minute. I remembered a bike shop on the edge of Palma and begged them to help me out as bigger climbs were afoot to get home. They kindly stripped out the wires, found no faults, put it back together and it just started up working again!! Defo the heat i think. Got back home ok but it then packed up again a few days later. I cooled off the bike in an air conditioned sympathetic garage and hey presto it worked again!! It was around 34 degrees and would be hotter inside the frame i guess with the sun beating down. Have you ever had this with Di2? It was Dura ace 3rd gen woth the clever battery. Cheers.
Lol electronic shifting is such junk. Can't even handle being ridden outdoors where bikes belong! What a joke
When Guy Martin did that land speed cycling record he had a crazy setup that he couldn't even pedal from a standstill. There's always a niche.
There was a guy - Nic Bowdler - who used a TT bike with a 77T chainring. I remember him passing me on the Bentley course (I think it was a 50) like some sort of stealth weapon.
Absolute cinema for the sunday!
Make Andrew Feather ride it uphill!
As a velomobilist I can truly confirm, that there are way bigger chainrings than 75 teeth, Man are you joking? 75? I could walk instead.
Was thinking the same although I‘m only riding a 60 because I live in Austria. But I know some riders in northern Germany with 80+
More crazy videos please 😁
I was at a ski resort yesterday with a lot of MTB off-road downhillers around. The bikes, however, all seem to be geared for extreme climbing. One of those rear cassetes with the huge low gear cog would be interesting with this chainring. You’d need the second chain for sure though.
drop down to a 61/57T. Also upgrade the rear derailleur with a 11-46T if using the 75T front Chainring. This should make up for the easy to pedal feel and speed. Larger front Chainrings is only beneficial if used correctly with gear selection of the rear cogs or going downhill. If you're on a flat surface then selection of the rear cog should be somewhere between 16-23T (comfort). And if you want to speed then 11T rear cog preferably. If your quads is capable of handling the harder Candence.
Worthy test for every future GCN presenter. Makes me glad don't live anywhere near you, though I felt like I attempted a similar challenge on the hills above Oakland California near San Francisco.
Absolutely ridiculous video, love it!!! 😂 ❤U👋🏻
Straight to the bike vault! Ultra Nice!
Alex holding the light saber precariously at 3:15. LOL.
I think 54 tooth chainring its like the optimal for a road bike, more than that, it starts to turn into track bike, but you dont have climbs, traffic, and so
My road bike has double 54t/42t chainrings and 11t-34t rear rings, which is more than enough for me, and I've never run out of rings on either side. Chainrings with 75t are only for making fun videos like this.
I run.
Fifty five sixteen on my fixed gear. I'm thinking about putting a 56 on my titanium in hombernaro.Road bike
Use that 75-tooth on the longest bike record attempt I was alluding to in the "Secret Features of your Shimano Di2 Groupset" ...
I run a 52 -14 on my track bike, 54- 16 on my FIXEDGEAR, and a 2x with a 56 chainring and a 9 speed cassette with a 11-23. If you ruñ shorter than what you normally run it will work. Nice you figured out the clearance. 🌀🌀🌀
Omg, I’ve never seen anyone else apart from Mean Cycling have this set-up.
...and I think he'd beat both Ollie and Alex up that hill! 😊
ok. time to attach this to one of those city bikes with the basket on the front and give it to Hank to try out on Mt. Ventoux
I have current upped my gearing to 53t and the speed gain ( maybe it’s a placebo effect ) on the flat is amazing 🤘🏾🤘🏾 I did see a 54t DA on a website for sale and was thinking about bidding for it but changed my mind last minute and say maybe 53 is good instead of going crazy lol
Great stuff lads!
spotted the "That's what she said" joke here lmao 5:49
I can imagine that the chainring might suit a single speed/fixed gear providing you also increase your sprocket size - a 50/16 up to 75/24 - same gear inches but less tight articulation thus saving watts. It would look bonkers though. Or maybe it is used on a recumbent which due to much lower drag can require bigger gears.
next you should try the smallest chainring you can find and a mountain bike type cassette with a 50T cog so its a really low gear
Dr. Bridgewood was so right about "some niche applications" to exist. This video is living proof that at least one application exists. It unequivocally proves that the statement "not all heroes are idiots" is fully reciprocal.
Great Wall hanger, have a 62 from the Kamikaze days.
I use a 75-tooth and Schlumpf Mountain Drive (2.5 reduction in low range) with an 11-50, 10-speed cassette on my velomobile. It allows cruising at 55-60km/h on flat ground and 80-90km/h on the downhills.
I would love to see them do this again but paired with Shimano’s gravel cassette and derailleur, or better still on a bike with Drivelines 75 tooth chainring, paired up with SRAMs AXS shifters up front and Eagle AXS rear derailleur and cassette, to give a 50-10 rear cassette (assuming they were compatible - I confess I’ve not looked at the compatibility with the chainring and SRAM).
See Ollie’s match stick legs power up that hill with a bigger bailout gear!
I see Albert has a nice variety of Dura-ace chainsets in his garage, with that 7800 series
There is nothing new under the sun. TA did a 68 tooth chainring back in the early 60s. I rode up and down all the big hills in Bath with a 23t largest sprocket. I glazed the Mafac brake blocks coming down Wellsway. Toe clips and straps of course. I was only 17.
I used to use a 12-23 cassette, until 8 years ago.
The Dura Ace jokes will never stop!
It's not even a meme any more, Alex really does just have random bits of Dura-Ace laying around everywhere lmao
3:15 in fact the opposite is true, having longer cranks gives you more leverage and thus an effectively lower gearing. imagine going down hill with the 75t chainring with 165mm cranks, you would be able spin faster than with 180mm cranks. LONGER cranks means LOWER gearing. so for the purpose of this video, the 180mm cranks actually does't make a lot of sense.
The biggest chainring I ever used was on a 105km tandem record ride that included 1000m of altitude lose and a 60kmh tailwind, and that was a 64t ring running onto a 13t smallest sprocket.
I have the 69T version of that chainring. I cut shift ramps and added shift pins to it and made a 52-58-69 triple. Moved the FD up and trimmed the cage to shape. Rear is 7 speed 14-28. 8 speed chain. Big ring shifts perfectly.
Hahaha. Why though?
Lol what is the use case for this? Do you only ride down mountains on a 1980s bike?
@@pierrex3226 I couldn’t get past 60km/h with the 52T and 14 sprocket and I had custom painted the bike frame, wheel rims and hubs so I wanted to keep the wheels. Easiest solution was to put on a bigger chainring.
I believe that you have won the internet, sir.
why don't you use a 12-23 with a smaller chainring ? lol
I have that chainring and it is going on my newest e-bike that is arriving later this week.
This is great, just a lads day fluffing in the shed (although a fancy one) and trying silly things
Makes me think about this new aero bike by decathlon that came with a 52/39 in the front (too much for most average joes here in the German Mountains I'd boldly assume), but then had a humongous 11-34 cassette in the back to equal it out.
Good details, on switching out!
I've done more than 80kph pedalling with a 52-12 (downhill, of course!). Souplesse is the key to going quick. ;)
Mark would love this😂
Not Sure If I worked this out correctly but I Think the Top Speed on 75 Tooth Crank with an 11 Rear is 60/KMH 37.2 Mph (Flat Road) 70RPM
@@TESTA-CC yes that seems to be accurate.
need power overlay when cranking up that hill
Try motor paced racing on an outdoor track. You can even reverse the forks to get closer to the motorcycle and reduce aerodynamic drag
Yeah that's a monster. And yeah, it was fun to watch. Some world tour riders could find a legit use for it, certainly. Not me, I'd enter cardiac arrest.
Still glad i got 2 x gears on my Gravely commute bike. Small gaps between gears so you can find the comfy one for the slope you're on.
Lowest gears low enough. And If i'm going fast enough for my high gear to topped out i'm going fast enough
Lovely of that van driver to wait for Alex...
That chainring was probably designed for a custom made recumbent that is enclosed that will allow a rider to hit 130-160km/h because of little drag and wind resistance.
with small wheels
Can you do a comparison. Like a TT on a circuit. Original setup vs the big chain setup? That would be awesome
Love the mad scientist lighting, very Dr Frankenstein
That's my fixed gear setup, 75 - 11, I take the Highway to work. On the weekends I win hillclimbing competitions with this setup. The only thing that is hard with this gearing is to resist the temptation to put an even bigger gear on.
Would be cool to see the result of an inverted experience : a very small and tiny front chainring (10-15 tooth) combined with a super big cassette. Take then the bike to super steep climbs.
I would think making the chain smaller would enable the whole system to be lighter & more efficient. Not sure if it’s been tried, but I would guess the improvements in modern materials would make it possible.
On my eBike#2 I run a 48 front and 11 rear and could use bigger in front at over 30mph ... Starts getting close to the ground though. Then with a 20 inch rear wheel on my recumbent some taller gears could be used.
Maybe on a tandem track bike….
A friend of mine raced (just once!) with a Sugino 64T. Just didn’t work. Also the leverage (Q-factor?) of the pedal spindle to to chain means your pulling a lot of leverage.
It's great for a pedal boat where u need the extra RPM for the prop! :)
75-16 is the same as 52-11 and 75-32 is the nearly the same as 52-22 & 36-15 which I often use for quick-enough take-offs from red lights or quick scrambles up short but steep knolls. I’d actually like 1x with a 75t ring for commuting at walking pace cadences, if only they did them in a nice DA Track style svelte archway design instead of just a bulky plate with teeth.
I have ridden with a 56T chainring for a year now on my TRIBAN RC500 road bike with SHIMANO SORA groupset, and was able to achieve faster speeds than you have on the 75T chainring. For me, a 56T is enough! Kudos to ROTOR by the way, which also produces monstrous chainrings - I mean the sizes are still within limits.
you could have got the 100t elite track chainring from velobike, not sure about compatibility for track components on a road bike though,
This would be great on an e-bike with high torque motor. You could set it at one gear and use the motor assist levels as your “gears”! Uphill and down on the one gear! Superb!!!
I am putting this exact chainring (I already have it) on a Billy Goat V3 that is arriving at my home later this week. The issue with that bike is spinning out because of how fast it goes. I want a bike that doesn't spin out at top speeds.
@@JoeBManco nice! Best wishes!
@@alphauno6614 Thanks! This will be a bicycle that will become a new way for me to commute to work, which is 24 miles one-way.
my ebike is so fast the gearing it came with is useless at top speeds, with a chainring like this i could be able to contribute at the top end :+D amazing video !!
Sally in the Woods??.....I've got a "haunted" road like that, that was on the route of a fast group ride that I used to do. Its name was Munger Road. Somebody even made a movie about the legend, with its name ("Munger Road"). They even used the railroad crossing as part of the movie. Maybe it was haunted. One guy went down hard, after hopping the tracks, at speed.
The speed test achieved only 44 to 45 mph. I can spin a 53x12 at 130 rpm, that fast.
My large chainring is 52t with a 12-25t cassette. There is absolutely no way I would be able to pedal a 75t, except on a descent.
...last time I made 74km/h (downhill of course xD) on my 50x11 tiagra on Giant TCR and I was spinning like crazy I'm 100% sure that its easier to spin crazy fast for longer than spin hard
btw love your channel and greetings from Poland!
I will stick with my normal Ultega thanks. Crazy but fun. Cheers
Dig out your hour record bike and put on that if your track crankset has the correct BCD. Back to the velodrome and give it a go. Not another hour mind you but some shorter efforts, maybe 10-15 minutes? Even a roller session in the pit to warm up would be interesting.