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bontrager carbon wheels shudder when braking
I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? thx -- bob_chew |
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bob_chew Wrote: I have a set of bontrager carbon aero wheels and while I do love the there is one thing that bothers me about them. When braking the shudder (especially the front) which can be disconcerting in a hig speed corner. I have cork brake pads. A friend of mine has the sam wheels and experiences the same shuddering. Anyone know why this happens and what can be done? thx It is an oscillation that happens due to the materials involved. think I even read someplace that Lance commented about it when he use the same type rims and brake pads in TdF. OCLV or almost any carbon fiber doesn't disapate heat very well. Is your shuddering immediate or after some time when the brakin surfaces have "warmed up"? I would check with Bontrager for any special handling of th materials. I once experienced a similar issue with Low Spoke Count Paired spok wheels (Rolf) that had aluminum rims and using Campy brakes. I didn' have time to try anything with surface cleaning of the brakin surfaces, but that is what I would have tried first. It wasn't m bicycle and the owner said he wasn't interested in my trying to resolv the issue -- daveornee |
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bob_chew wrote in message ... I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? thx Are the wheel bearings loose? Trevor |
#4
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bob_chew wrote in message ...
I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? Does the rim get narrower where the spokes pull on it? This was the case with a friend of mine. The shop got replacements that were marginally better, but not much. |
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I experience similar shuddering with my Race X-Lite front wheel and
hard rubber brake pads. It's decidedly unpleasant. I use a Race-Lite front wheel too. It also shuddders a small amount but is bearable, and I favor it over the X-Lite. Both wheels are true and the bearings are adjusted. My explanation for the vibration is the pads are "chattering." Maybe a micrometer could be used to determine if there is deformation. The X-Lite seems to be a stiffer wheel than the Lite, which I think facilitates transmitting the vibration up to the handlerbars. dianne_1234 wrote in message . .. bob_chew wrote in message ... I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? Does the rim get narrower where the spokes pull on it? This was the case with a friend of mine. The shop got replacements that were marginally better, but not much. |
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On 2004-08-21 12:47:41 -0700, bob_chew
said: I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? thx CF rims aren't known for their braking prowess. If you're using them on an everyday basis, I pity you. |
#7
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On 2004-08-21 12:47:41 -0700, bob_chew
said: I have a set of bontrager carbon aero wheels and while I do love them there is one thing that bothers me about them. When braking they shudder (especially the front) which can be disconcerting in a high speed corner. I have cork brake pads. A friend of mine has the same wheels and experiences the same shuddering. Anyone know why this happens and what can be done? thx CF rims aren't known for their braking prowess. If you're using them on an everyday basis, I pity you. |
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