The GT goes single speed with no tensioner.
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- Опубликовано: 6 май 2021
- Tight tight! Chain tension. Vertical Dropouts. No Tensioner.
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Sorry to reupload!
I totally blundered the upload lol. I finished editing it last night and uploaded wanting to schedule it for this morning.. but made it public right away.. then scheduled it.. then it was horridly performing because it sat "uploaded" for 10 hours with no views. RUclips algorithm doesn't like that haha
I will happily watch this video again
The real MVP right here!
I’ve built dozens of singlespeeds on vintage mtb frames and sometimes you get lucky and the chain length works out perfect, this is very rare
thats kind of the beauty of me using as many BMX parts as I can. So when weird combinations come up for the exact chainstay length for the proper tension i found; i can get the chainring/sprocket of the size.
Thanks bro for the link. That will help me with future free wheel conversions.
When I was doing single speed (and eventually dingle speed) for my mtb, I had around 5 nine speed chains that were at various levels of "stretch" so they could fit whatever gear I had. You have a lot more fudge factor for magic gear if you keep all your used chains. : )
Lol this was absolutely going through my brain as I was sizing this chain up
6:41 The beauty of trial and error. How beautifully relatable.
Dude I had the exact same idea for a Tequesta I traded my brother for. Single speed mountain bike set up like a bmx bike only with track bike cranks. It came out rad af and actually rides very comfortable. Fun to toss around and bunny hop on and off random things
I am so excited to ride it with all the proper parts haha
vertical dropouts, no tensioner. Dude me fumbling about with this on horizontal dropouts for the past two days and you just... do it. I've got mad respect for you.
Nice! The GT reminds me of the All-City Junkyard Dog. Just a 26" do whatever shred sled.
Yeah! Just a super inexpensive beater version haha
Profile racing down here in Florida still makes them, I have both their outboard and inboard euro bb's and I love them!
I was going to recommend the same. The outboard with a longer spindle.
GTMX! I love it. Looking better every day.
Thanks for the stickers! Norton is going on my new tool cart when I get it. Oh yeah, I now want to build one of these up too and I don't have room for anymore bikes.
Search your feelings, Eric. You should make a mid-year bike check video. Your growing channel deserves it. You know it to be true.
I just switched to a single speed. I live in Sedona so we got hills. The 'unicorn' gear/parts availability for me is a 130bcd crank with a 38t chainring and a 22t freewheel.
What's the speed on that gear
I tried and failed to find the unicorn gear so I went with the gears I liked and threw on a surly tensioner. Thanks for the vid! 🍻
I have a GT Outpost from the mid 90s. I love the triple triangle. Still ride it all the time. I will never sell it.
still undecided on where to go with a beat up 90's bianchi mtb, this is giving me some serious free advice
don't be afraid to experiment! the single speed thing is pretty much free.
Nice! Had same issue with chain jumping off (using a 10spd chain) and switched to a BMX chain that solved it.
Yeah i think the taller teeth of a proper freewheel with the tension at the combinations for the 434mm length will result in pretty spot on tension/not dropping
Nice GT the way to go awesome bike build so far 👍🏻⚙️
I’m using a ghost ring on my ss 95 Marin beater and it’s perfect!!! I shred the woods with it in all conditions and it hasn’t popped out once yet🤞🤞
I will definitely be trying this on a bike again some day! If the chain is strong it'll go forever.
You’re making me want to build one of these...
awesome awesome this thing is dope
I'm so excited for the proper parts to arrive haha
I used a Cult half link chain to fine tune the chain length better.
I’ll be able to do that later with a different chainring, but the narrow wide would keep that from working
@@Spindatt maybe but I'd bet a bmx chain will be wide enough to fit on that narrow wide. Thoughts?
The floating chain ring you had on your brother's bike was badass.
truth
What about just using a half link chain or a half link master?
I’ve spent many hour’s in my life trying to single speed without a tensioner I have respect for people who try
Lol it’s a really good way to waste time
I gave up too. The major problem is not having perfect round chainring. When you have perfect tension as you turn the chainring you get tight spots and loose spots 🤬 I used a rear derailleur as tensioner on my cruiser bike with playing with the limit screw for a perfect chainline.
Love the little clips of the Ramones playing in the background
I was definitely toeing the copyright line by leaving that in there haha
Love those old GT frames, especially the Xizang.
I love how lowkey you're advertising the Panaracer by wearing the beanie on a right angle while you're explaining how you gonna figure out your unicorn gear ratio. :D
Gotta get them their support of me worth! Haha
You also could get a eccentric bottom bracket just an idea
Yes definitely, only problem is I’ll be limited to the kind of crank I can use. I’m super wanting to run a BMX crank and sprocket on this one, so a unicorn gear is (in my brain) the best bet haha
True wasn't thinking about that part lol I've never had any luck with a unicorn gearing my self always get stuck using a tensioner they suck lol
You can always find one, sometimes they are just the worst ratio haha
Careful GT might start making the GTMX soon because it’s so rad!
I'm waiting for the horizontal dropout welding vid that this frame needs. You could file enough of a slot in the break mount to get a links worth of slide on the caliper which would be enough with a little finesse
haha this totally has gone through my head. Figuring if i do destroy the rear triangle, it might be fun to try and fix with horizontal drop outs
Real nice job .. it is possible instal alfine11 hub on rear wheal ??
Spindatt; have you seen the tensioning you can do by using a sprocket from a cassette in between the rear sprocket and the front. The sprocket fits tight between the chain horizontal runs. As you put pressure on your crank the upper chain run obviously pulls tight, but this then puts pressure onto the bottom run thus taking the slack out. It gives you a little variation on what sprockets you can use on a vertical dropout frame so that you can still use your perfect gear ratio. I used this method with a kona lava dome in 2005 when I was an apprentice, it allowed me to run 32-15 gearing even though the gearing didn’t ordinarily allow a tight chain. I’m no fan of half link chains, they stretch so much constantly pulling the kink out of the links.
Rides great.Feels great.Looks great.
It definitely deserves some Surly Sunrise bars :)
☀️
The bike looks good as is. The tall fork gives it a bit too much rake. I like the uncluttered clean look of it with the more complicated frame design.
I tried doing that with my rear hub motor once. The tension was pulling my wheel out of line. Even went into my frame a couple of times
Do you think the narrow wide chainring helps it from dropping?
I’m sure you’ve already got this sorted but Odyssey make an awesome Euro BB in 19 and 22.
Love all the vids. Thanks man.
I've seen them but never in stock. I'll check again!
@@Spindatt dang. I’m in Australia. It’s rare that we have parts that other countries don’t. We are at the end of the supply chain..
Long story as to why I was looking at BMX parts. I found this place called Pork Chop BMX in the U.S. maybe you folks know it? Might be worth a look?
Probably know this but you can use a half link for minor adjustments.
as long as you aren't using a narrow wide it'll work yes!
As said in the wrong upload: go with Profile racing as bling option for the bb. Odyssey, dmr, dartmoor, s&m, octane one, radio bikes are cheaper option. Maybe you can also find a butchered generic brand dirtjumper to stole the bb from
Thanks for coming back! haha
I have a set of profile cranks that definitely won't go on this, but would swap onto my bmx, and then put the 19mm SaltPlus cranks onto the GT. Radio makes one? I wish i knew more DJ companies. Could have solved this way sooner hahahah
@@Spindatt I know for sure that my "not so" local bike shop has the radio bikes euro bb in stock. Too bad i don't think shopping from Italy could be a viable option for you.
For this project some of the hardcore dirtjump brand, like Dartmoor, would have solved a lot of issue right away
Checking now. Thanks for the heads up friend!
Found with my older stumpjumper I can use the almost horizontal dropouts and get an awesome singlespeed 🤣🤣
Ha, cool! Nice work.
I was thinking this would only cool one room, but it does well at cooling the entire floor.
Was literally googling about how to do this like a week ago
I’m running 32 and 13 and it’s just easy enough to grind up hills in the Bay
Luckily for me my single speed vertical dropout behaves more like a single speed horizontal dropouts. It's a unique vertical dropout that internal gear belt drive bike frame have to allow some adjustability/play. Thus I don't have to look for that unicorn gear. What will happen instead is the skewer and wheel will be at different spots at the vertical dropout like horizontal dropouts with different gear ratio.
1 tooth makes about an eighth of an inch change of chain but dependent of wear on the cogs and chain can make it swing a bit off of the estimation.
I did this with a gt mtb 10 years ago and it got totaled while mounted on the bike rack of a city bus after the bus rear ended another bus… I was on my way to a photo shoot for the bike 😢 the city compensated me, however, I haven’t been able to build another since
8 spline truvativ cranks from Amazon work great as BMX style cranks.
Dope!
Could be a dope bike polo beater
i have gt's running on single speed 16/32 and 18/36 both doesn't use any tensioner
If you need a euro bmx bottom bracket, try Odessey or black ops bottom bracket. They are cheaper bottom brackets but if you want high end, you can buy a profile euro bottom bracket
Profile Racing (19mm), Mission BMX (19mm), Odyssey BMX (19mm and 22mm) and Eastern (???) all make Euro BBs. I think there are a couple others as well.
Ordered an odyssey that happened to be in stock, and not eye watering expensive
Would BMX style half links chain allowed you more options? I used to use that trick 10yrs ago and avoided vertical dropouts since then for SS builts, but if I remember well, it seemed to give me options to use the cogs I had laying arounds that normal chains would not.
It’s definitely would help, but won’t work on a narrow wide chainring
@@Spindatt 2000s didn’t have narrow wides - old school chain keepers that was or perfect chain lines + “hope-for-the-best” attitude. Your point is valid and it looks better ah!
What about a half link chain?
If you are getting a new hub anyway, why not an eccentric hub like White Industry ENO? Cost more I assume, but would save the headache?
What about eccentric bb?
13t thread-on freewheels? do they go that small?
For metric yes.. which means no for my surly hub.
Damn my BMX knowledge and it clouding my non BMX knowledge
you should put an fsa the pig headset on it, bombproof, cheap and mean looking
this has been floating around in my mind
Nice work! But it looks you didn't use a half link in the chain? Because that opens up a lot more possibilities for finding the magic ratio. Also regarding the BMX cranks - I'm surprised that you had trouble finding a Euro BB cos they're pretty common, but they are quite weak due to the small size of the bearings. However you can make a DIY BMX outboard BB using Shimano Hollowtech BB cups. Just tap out the bearings and tap in a set of Spanish BMX bearings with the appropriate spindle size (19 or 22). You need a longish spindle and also need to get the internal spacer width spot-on. But it's awesome and way stronger than a standard Euro and looks awesome too.
It’s got a half link chain on it now! And an odyssey euro bb with proper BMX cranks. It’s frigging sweet now
You could double your options if you just use a half link chain or even a half link master.
If the freestyle fork fit's the 700c wheels from the tracklocross you could make a bar spin able tracklocross hybrid. That would be a dope video! I have a surly steamroller with still pour freestyle forks and its the shit!
I do believe this fork would probably fit a 700x32 pretty easily. Without checking and knowing for sure haha
@@Spindatt the head tube length is also a factor to consider, i bought my freestyle fork and even without cutting it i could just barely fit my stem on top with no spacers😅usually they are for bikes with integrated headsets
bear in mind that 25/9 on a 20 inch bmx wheel is way easier ratio because of the smaller wheel than 26'
ah yes, thats the truth
Why not go with the standard 40/18 gear ratio? It’s standard for a reason. It’s the best combination for a single speed 700c or 29 inch bike
because that wasn't a unicorn option for the chainstay length of this bike
you are lucky you got exact fit for the chain.
Have you tried fixed cog?
I have not, but fixed on this bike would suck I think
But will the chain stay tensioned or it will be slacking after a few days of riding?
I bet it will slacken a bit. Not enough to drop though
were thoses P2 forks or something else?
i don't know what the old fork was actually. New one is Cult
Do the bar and stem already it’s been 3 vids on this bike
I literally don’t have them. Like. I literally can’t do it.
I was able to put a 36-18 drivetrain on my GT with almost perfect chain tension.
Tonnes of options in there! My 30-13 is a little more BMX-y, and I'm really happy with the chain tension. Love this process
@@Spindatt GTs look cool as hardtails. Especially smaller sizes. Their early to mid 90s paint jobs are very cool. I had an avalanche in Daktari White which was white with black tiger stripes. Coolest looking bike I ever owned but broke the frame😂Check them out for some inspiration.
Why don't you try a half link for the chain, most of the time they work for vertical drop outs, that way you don't need a chain tensioner or derailer which adds weight to the bike.
Velos roy-o qc represent!
why not just use a half-link chain? +10 style points also
I’ve made grilled cheese in a hotel toaster. It.. works..
But does the cheese stay in the sandwich
@@Spindatt ya. You put the toaster on its side. 👌
I run Unicorn gear with the help of a Half Link
I thought about this, but wouldn’t be able to with a narrow wide
I knew you knew now we all know. Thanks for all the vids sir
You can turn any mtb into a single speed without chain tensioner my using odd and even numbers.Meaning that you have a 44 t in front you have to use a 13,15,17,19,21,23,cassette conversion or a bolt on offset number freewheel,15,17,21,understand?so if you put a 25 tooth in front you'll need an even number in the back.
Hans Rey approved. Lol
94 team scream is on the deck . Not disc brake but hey I’m not Kuching up this frame
yo spindatt, once you've built it up fully you should 100% get a 13t fixed cog that bolts to disk rotor mounts on the hub, put some straps on the pedals. you would have a one of a kind fgfs, mtb fun bike.
please just try that i think that would make a very interesting video
Lol my head thinks it'll fold the frame, but at the same time... can't be worse than the disk brake
@@Spindatt i think itll be fine its not like it would be a permanent thing constantly putting stress on the frame you could try it for a video :)
oh nooooooo! not the toaster!
Grilled cheese in toaster... pure evil!
Are you going to paint it?
I don’t thibk
A BMX halflink chain would help to solve the problem
Didn't this video already get uploaded about an hour ago
I totally blundered the upload lol. I finished editing it last night and uploaded wanting to schedule it for this morning.. but made it public right away.. then scheduled it.. then it was horridly performing because it sat "uploaded" for 10 hours with no views. RUclips algorithm doesn't like that haha
@@Spindatt no worries Eric, it happens, the video is awesome as usual
KMC half link total BMX chain
Love watching your builds
can i add a baby seat to this bike
I have a euro bb in my basement lol
Dammit
👍👍👍
Every SSer with sliders🤨🧐 Nice Temporary Speed😏
Too bad a 13t freewheel is metric threaded and smaller than the Surly hub will accommodate though. You are probably limited to 15/16t and up.
you are completely right. Looks like 32/15 or 34/17
Wide drop bar's plz...and a surly tensioner :)
Noooo! BMX bars and 360’s for the GTMX forever haha
That animal stem tho...
many desire
This bike needs a dropper
What you doing in my brain reading my thoughts!
@@Spindatt were both really smart so we think the same thing
Talk talk talk
well yeah.. I'm telling everyone about how I trial and errored to get the right gearing in real time.
Rubbish
how so? I got it working.
Didn't like the process on how i did it?
Don't like my face?
Thats okay, i appreciate you anyway!
This is precisely what I've just been doing with an older Nishiki MTB. 32:16 at the moment, but with a tensioner for now. Also, I'm a little irritated how well your's worked out...
its allllll about the trial and error my friend. I worked at it for 3 or 4 hours.