spunkey_monkey_boy Posted February 2, 2005 Report Share Posted February 2, 2005 this is taking the use of carbon fibre too far in my book!!! anyone fancy buying one and testing it so we can find out what they're like? http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...7130954763&rd=1 Quote Link to comment Share on other sites More sharing options...
Dan Hardman Posted February 2, 2005 Report Share Posted February 2, 2005 but that is on a track bike not a trials bike. good idea if you ask me Quote Link to comment Share on other sites More sharing options...
spunkey_monkey_boy Posted February 2, 2005 Author Report Share Posted February 2, 2005 its still a bloody chain ring! track bikes take huge force through the cranks/chainring/bb area, i saw a track bike that had had the bb completely ripped off the rest of the bike when starting a race!!! if it can stand up to track it should be able to stand up to trials... (a smaller one obviously) Quote Link to comment Share on other sites More sharing options...
OnzaNewbie Posted February 2, 2005 Report Share Posted February 2, 2005 You can never have to much carbon/carbon fibre. :P Quote Link to comment Share on other sites More sharing options...
sm_ben Posted February 2, 2005 Report Share Posted February 2, 2005 I love carbon and it is more than man enough to stand up to all forces Quote Link to comment Share on other sites More sharing options...
Trials Punk Posted February 2, 2005 Report Share Posted February 2, 2005 I can't really see the problem with it on a track bike. Where does this huge force come from too. As far as I'm aware all they do is pedal, sure they pedal fast but still it can't be that much of a force. Quote Link to comment Share on other sites More sharing options...
tank_rider Posted February 2, 2005 Report Share Posted February 2, 2005 I can't really see the problem with it on a track bike. Where does this huge force come from too. As far as I'm aware all they do is pedal, sure they pedal fast but still it can't be that much of a force. ← you've obviously never seen a start, they have thighs the size of my waist, they have stupid amounts of power. Quote Link to comment Share on other sites More sharing options...
JT! Posted February 2, 2005 Report Share Posted February 2, 2005 I would have thought the teeth would just cruble away. Looks good though. :P :P Quote Link to comment Share on other sites More sharing options...
Trials Punk Posted February 2, 2005 Report Share Posted February 2, 2005 you've obviously never seen a start, they have thighs the size of my waist, they have stupid amounts of power. ← I have seen it. My dad used to race it. They are beasts but the chainring is so huge the amount of torque is reduced, compared to a trials chainring. Quote Link to comment Share on other sites More sharing options...
Fishwog Posted February 2, 2005 Report Share Posted February 2, 2005 People under-estimate the power of the dark-stuff..... Quote Link to comment Share on other sites More sharing options...
Stan Shaw Posted February 2, 2005 Report Share Posted February 2, 2005 Good idea for a track bike! Doubt it could withstand trials abuse, although im not totally sure. Wouldn't the sudden force from gapping etc eventually fook the carbon? Stan. Quote Link to comment Share on other sites More sharing options...
fairy elephants Posted February 2, 2005 Report Share Posted February 2, 2005 Good idea for a track bike! Doubt it could withstand trials abuse, although im not totally sure. Wouldn't the sudden force from gapping etc eventually fook the carbon? Stan. ← Wouldnt it eventually fook most stuff? (Y)" I dont see why it shouldnt be used for trials. although it would be mighty expensive :sick: Quote Link to comment Share on other sites More sharing options...
onzamad Posted February 3, 2005 Report Share Posted February 3, 2005 you've obviously never seen a start, they have thighs the size of my waist, they have stupid amounts of power. ← yeh, the bikes are geared up alot, so it takes alot of force on the pedals to get them going, but as the riders have stupidly strong legs, they find it ok pedal, but there is still alot of force going through it. not sure if i explained that too well (Y) ... Quote Link to comment Share on other sites More sharing options...
Da Make Posted February 3, 2005 Report Share Posted February 3, 2005 Track/timetrial bikes have very big sprockets in front. So there will be lot less pressure on teeth with 48t sprocket compared trials 22t or so. Thats because chain had to "rest" along more theeth with a bigger sprocket. So smaller sprocket, greater the pressure on theeth. I think that theet would just "grind" away with trials usage. (Y) My mate actually snapped his steel 22t sprockets while gapping... And he also "ovalized" aluminium one too. Quote Link to comment Share on other sites More sharing options...
011001000110010101110010 Posted February 3, 2005 Report Share Posted February 3, 2005 Doughie Lampkin uses carbon fibre discs. Quote Link to comment Share on other sites More sharing options...
SebJT Posted February 4, 2005 Report Share Posted February 4, 2005 (edited) you've obviously never seen a start, they have thighs the size of my waist, they have stupid amounts of power. ← In Track they have a couple of laps to get up to full speed, then they line up while cycling and go through the start. So the actual acceleration and forces would be quite low. Another thing, you'd probably use that being a professional racer and replace it every couple of races maybe. Seb Edited February 4, 2005 by SebJT Quote Link to comment Share on other sites More sharing options...
totaltrials Posted February 4, 2005 Report Share Posted February 4, 2005 Doughie Lampkin uses carbon fibre discs. ← as Do formula 1 cars and motorbikes, we love the stuff phil. Quote Link to comment Share on other sites More sharing options...
RicH_87 Posted February 4, 2005 Report Share Posted February 4, 2005 as Do formula 1 cars and motorbikes, we love the stuff phil. ← yup, i wouldn't be suprised if 90% of an F1 car was carbon fibre. Quote Link to comment Share on other sites More sharing options...
Wayne-king Posted February 5, 2005 Report Share Posted February 5, 2005 yup, i wouldn't be suprised if 90% of an F1 car was carbon fibre. ← it is, pretty much! :blink: Quote Link to comment Share on other sites More sharing options...
nbr-chris Posted February 5, 2005 Report Share Posted February 5, 2005 Yeah carbon i hugely strong. People seem to think because it powders when it's damaged it has to be weak, it isn't. As for using on a chainring yeah its a good idea. Think how far they race and it still comes down to hundreths of a second at the finish line, it really is true when they say every gramme makes a difference Quote Link to comment Share on other sites More sharing options...
thefletch Posted February 5, 2005 Report Share Posted February 5, 2005 Does anyone actualy know what carbon fibre is? Its a cloth woven from carbon strands that is soaked in glue and baked basically. Its not stronger than aluminuin or steel but it has a very low weight so they use more of it to make it the same stregth. However its very brittle so for a chainring it would last about 1 race. You have to considered different stregths. i.e. tensile, compressional, torsional, impact etc Quote Link to comment Share on other sites More sharing options...
Wayne-king Posted February 5, 2005 Report Share Posted February 5, 2005 carbon is normally used with epoxy as well, which helps make it stiffer and stronger (Y) then they oven-cure it. it does have quite good compressive strength, and tensile strength, but it would be way too brittle to use as a chainring for trials Quote Link to comment Share on other sites More sharing options...
RicH_87 Posted February 5, 2005 Report Share Posted February 5, 2005 carbon fibre is really good at absorbing energy from big hits for example....it might not be durable but its still pretty strong becasue it absorbs most of the enrgy thats exerted on it rether than consentrating it on one area and bending/breaking. Quote Link to comment Share on other sites More sharing options...
Janson Posted February 5, 2005 Report Share Posted February 5, 2005 carbon is normally used with epoxy as well, which helps make it stiffer and stronger (Y) then they oven-cure it. it does have quite good compressive strength, and tensile strength, but it would be way too brittle to use as a chainring for trials ← You sure? With the right blend, layering (directions, thickness), combination of different fibres and the quality of the manufacturing (incl. autoclave treatment), you can get an extremely tough product, which isn't very brittle at all. If the riders would focus less on the looks of the fibre, and more on the performance of the composite, we'd see drastical improvements in quality and strength. Example, if you look at the aircraft industry, you'll hardly see the 'classic' CF weave, but fibres in one direction only, or other kinds of fibre composites. Aramide or glass fibres are more resistant to scratching and general wear... The components turn out in a brown-yellow kind of colour, but perform better. :( Quote Link to comment Share on other sites More sharing options...
Swize Posted February 5, 2005 Report Share Posted February 5, 2005 (edited) but that is on a track bike not a trials bike. good idea if you ask me ← I agree its a track bike and a good idear. But as spunky monkey sez there is a hell of alot of force on it dont think it would do 4 trials though . (Y) Edited February 5, 2005 by samthebiker Quote Link to comment Share on other sites More sharing options...
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