Juddering Shim. Hydr. Discs

Newish bike, first with discs, and everything was great but now they
make a low frequency noise and everything vibrates. It sounds like the
pads are made of plastic but I don't think they are old enough to have
worn through and the stopping power hasn't really depleted. Does anyone
here know what may be wrong?

Neil Cameron wrote in message ...
Newish bike, first with discs, and everything was great but now they make
a low frequency noise and everything vibrates. It sounds like the pads are
made of plastic but I don't think they are old enough to have worn through
and the stopping power hasn't really depleted. Does anyone here know what
may be wrong?

Why not replace the pads, easy and less than $20.

had a problem with my GIANT that was similer. Turned out to be the brake
fluid hose was clipped so close to tyre that under heavy braking (ie
depressed forks) would just catch the tyre tread and vibrate throughout the
bike. It felt like the bike was about to fall apart. It didn't do this under
normal conditions and was a combination of my weight, fast down hill, heavy
braking.

Nearly killed myself fiddling while screaming downhill before I worked out
was the cause, then felt stupid for not realising this.

Pip

Neil Cameron wrote in message ...
Newish bike, first with discs, and everything was great but now they
make a low frequency noise and everything vibrates. It sounds like the
pads are made of plastic but I don't think they are old enough to have
worn through and the stopping power hasn't really depleted. Does anyone
here know what may be wrong?


"Shimano"...?




Shaun aRe - More seriously, they may need a clean - the VERY best thing I've
found, is fine, silty mud - get a scoop of it, cover the disc itself, ride,
brake hard, repeat. If the mud wears off and you're still experiencing the
judder, add more mud and go again. If this doesn't work, well, could be
something else I suppose (see above *semi*-facetious answer) - I've also
seen sloppy (too much fore/aft play in cheap/work forks) forks cause this
before