Mr Motivator Posted November 14, 2008 Author Report Share Posted November 14, 2008 Seems like there's quite a lot of interest in this.I might make one, it wouldn't be that hard. I'd probably use a fixed tensioner though, just like a cam belt on a car.I'm actually going to the breakers yard later today, I'm going to pick up a selection of ribbed tooth pulleys and get modifying! Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted November 14, 2008 Report Share Posted November 14, 2008 too much spare time? Quote Link to comment Share on other sites More sharing options...
mafu26 Posted November 14, 2008 Report Share Posted November 14, 2008 i think orange made a prototype belt driven gringo. the test didn't go all that well from what i can remember reading.they didn't cut the frame though... the put the driveside chainstay on last and then welded it on with the belt already inside the frame Quote Link to comment Share on other sites More sharing options...
wally Posted November 14, 2008 Report Share Posted November 14, 2008 Seems like there's quite a lot of interest in this.I might make one, it wouldn't be that hard. I'd probably use a fixed tensioner though, just like a cam belt on a car.I'm actually going to the breakers yard later today, I'm going to pick up a selection of ribbed tooth pulleys and get modifying!Apart from getting the belt to pass through the rear triangle of the frame, you cant break it like you can with a chain. I think friction is another failing point. Quote Link to comment Share on other sites More sharing options...
Mike Poyzer @ Onza Posted November 14, 2008 Report Share Posted November 14, 2008 We already tried it over a year ago. We worked with that belt manufacturer who made us a special unit to fit with the drop stay frame which we were testing at the time. Tried two belts of the strongest type they made and they lasted about two minutes each time before snapping. I'm afraid they were just not up to the shock loading of trials bikes. Quote Link to comment Share on other sites More sharing options...
dave33 Posted November 15, 2008 Report Share Posted November 15, 2008 defo the future, just think how strong these are, some harly type choppers have them... Quote Link to comment Share on other sites More sharing options...
Spider Lad Posted November 15, 2008 Report Share Posted November 15, 2008 We already tried it over a year ago. We worked with that belt manufacturer who made us a special unit to fit with the drop stay frame which we were testing at the time. Tried two belts of the strongest type they made and they lasted about two minutes each time before snapping. I'm afraid they were just not up to the shock loading of trials bikes.defo the future, just think how strong these are, some harly type choppers have them...maybe not eh? Quote Link to comment Share on other sites More sharing options...
Nick Manning Posted November 15, 2008 Report Share Posted November 15, 2008 I find this thread quite funny. This isn't new. As Mike said they tried this awhile ago, and I remember a local bike shop having a single speed bike that was belt driven, this must of been when I was still at school, so probably some time between 1997 and 2001. More likely to be nearer 2001 though.But my point is, this isn't new. Quote Link to comment Share on other sites More sharing options...
spartan Posted November 16, 2008 Report Share Posted November 16, 2008 No man i think its a cool line of thought u know.Like in the 80s they wouldnt have dreamed that we would be cruising the internet and buying shit from taiwan from our desksa a decade later.If they try for one of these in five or ten years they might have and ill belt drive that would be mad silent and stuper tough thats weighs next to nothing.And maybe if they made some sorta link like a chain but burly in the material so that you could split it.Maybe a friction joint or something with a little spring in it. Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted November 17, 2008 Report Share Posted November 17, 2008 I was going to ask wether the stretch applied to them in short burst would lead to snapping eventually Quote Link to comment Share on other sites More sharing options...
durkie Posted November 17, 2008 Report Share Posted November 17, 2008 it says its made from polyurethane! they just named the company "carbon belt drive" for effect then...?i'm pretty sure that the belt is reinforced with unidirectional carbon fibers. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted November 18, 2008 Report Share Posted November 18, 2008 i should hope so..! Quote Link to comment Share on other sites More sharing options...
Adrian Posted November 20, 2008 Report Share Posted November 20, 2008 Imagine on a road bike, thats going to be almost silent. Which is kinda cool.with no gears, how about.. belt drive and a hammershmit (sp) , then at least you have two gears?was thinking, i dont really believe that it can be more responsive, as long as your chain is tight.... unless your telling me that a steel chain stretched more then a plastic belt? and that much that you'd notice it? and this thins well going to wear faster, chains only stretch then snap, this thing had teeth on it so theyre going to wear out, its still going to stretch and snap aswel.... so you'd need to replace it more, i bet after some riding when its all hot from friction its get stretchier aswell lmao, will be like spongey you may be able to hang this and that from one of these but some chains hold more then a tone, but you will still snap them, so thins thing only hold 800pounds or what eva is nothing, it wont handle the jurking from trials....this is just a plastic chain basically.... so whats the point? less sound? thats all thats good about it really lol jus buy a super light chain Quote Link to comment Share on other sites More sharing options...
durkie Posted November 20, 2008 Report Share Posted November 20, 2008 with no gears, how about.. belt drive and a hammershmit (sp) , then at least you have two gears?or an internal hub. then you have 14 gears, much less maintenance than a derailleur system, and gear changing from a standstill.and this thins well going to wear faster, chains only stretch then snap, this thing had teeth on it so theyre going to wear out, its still going to stretch and snap aswel.... so you'd need to replace it more, i bet after some riding when its all hot from friction its get stretchier aswell lmao, will be like spongey except that nylons and urethanes and polyethylenes and... all have better wear and abrasion than steel. and with carbon fibers in the belt, it has the potential to be much stronger than a chain.you may be able to hang this and that from one of these but some chains hold more then a tone, but you will still snap them, so thins thing only hold 800pounds or what eva is nothing, it wont handle the jurking from trials....that's true. doesn't mean there can't be a beefier version for trials. motorcycles use belts after all, and they put down a hell of a lot more torque than trials does.this is just a plastic chain basically.... so whats the point? less sound? thats all thats good about it really lol jus buy a super light chain zero lubrication, less mess, longer life, lighter weight, fewer moving parts.give it a chance! Quote Link to comment Share on other sites More sharing options...
ZeroMatt Posted November 21, 2008 Report Share Posted November 21, 2008 To stop such a belt from slipping on the smaller sprockets trials requires the tension would have to be really quite high, putting extra stress into the bearings making them fail quicker. May also significantly increase the drag in the system potentially leeching power from your moves making the kick less explosive.That is even if they could take the loads of trials. Quote Link to comment Share on other sites More sharing options...
trials_pimp Posted November 21, 2008 Report Share Posted November 21, 2008 how often do you have to change a cam beltYou having a laugh arent you? Seem like you know 2 tenths of f**k all.Average Cambelt Life on an Engine is 40-60,000 Miles. Id love to see you get anywhere near that on a bike. Letalone put the stresses assosiated with running an Internal combussion Engine in there aswell.Gates Make some of the Strongest Belts on the Automotive Market. If a cam belt can survive 40,000 Miles on an Engine With anywhere up to 1000 BHP, then it can withstand some twat on a bike.To stop such a belt from slipping on the smaller sprockets trials requires the tension would have to be really quite high, putting extra stress into the bearings making them fail quickerAlso Complete bollocks.Belts Do Not randomly slip on Engines and they are under massive tension. Basic Rule of thumb for cambelt instalation is the Tension it with 1" movement in the longest Part.Yes they can jump when worn, but again we are talking of running an Engine, not a bike.even if they could take the loads of trialsIm not even going to bother pointing out, again, how uneductaed and dumb some of you people are. Quote Link to comment Share on other sites More sharing options...
forteh Posted November 21, 2008 Report Share Posted November 21, 2008 (edited) To be fair though the peak load on a cambelt is on startup, once the engine is running the loads will reduce to a constant depending on revs, a belt in a trials situation would be subjected to massive shock loads. If its tensioned right it shouldnt slip, but I wouldnt expect belt life to be particularly good (as proven by onza). Edited November 21, 2008 by forteh Quote Link to comment Share on other sites More sharing options...
Jamie_Neal Posted November 21, 2008 Report Share Posted November 21, 2008 Belts Do Not randomly slip on Engines and they are under massive tension.I think the issue of tensioning the belt may be a sticking point as I'm not sure how the hub bearings/freehub would like it. It may be better if a freewheel system was used and then the hub would just have to withstand the tension of the belt. Quote Link to comment Share on other sites More sharing options...
ZeroMatt Posted November 21, 2008 Report Share Posted November 21, 2008 Im not even going to bother pointing out, again, how uneductaed and dumb some of you people are.We already tried it over a year ago. We worked with that belt manufacturer who made us a special unit to fit with the drop stay frame which we were testing at the time. Tried two belts of the strongest type they made and they lasted about two minutes each time before snapping. I'm afraid they were just not up to the shock loading of trials bikes. Quote Link to comment Share on other sites More sharing options...
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