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

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

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

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.

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.

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.

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.