Hydraulic Disc Brake Vibrating

whitestar1

its the rear disc brake (got let by a car) - the shop has already dropped the wheel checked the callipers and the rotor - no problem. Yet its vibrating and making a lot of noise. its driving me crazy :evil: Please can you help?

nicklouse

when is it doing this?

red eye

when he's riding

nicklouse

red eye wrote:

when he's riding

so not when braking only when not using it?

red eye

does braking while on the bike count as riding the bike? :P

nicklouse

you know.

sand_dancer

had the same problem with my rear brake when braking hard. Rear end vibrating like crazy and making juddering noise. Took pads out, quick smear of copper grease on the back of each pad and problem solved.

cooldad

sand_dancer wrote:

had the same problem with my rear brake when braking hard. Rear end vibrating like crazy and making juddering noise. Took pads out, quick smear of copper grease on the back of each pad and problem solved.

The problem was probably solved when you replaced the pads properly, not the grease.

whitestar1

Hi All
It happens when I am braking - rear disc and not all the time but often enough and it can be bad too. The front is ok. I am a noob with bikes so dropping the rear wheel or dismantling the calippers/rotors sounds like a very big deal to me. Went to the store I got it from and they had dropped the wheel and had a look at it, but the noise and virbation is still there.

andrewjoseph

I'm sorry, i don't understand, what do you mean 'got let by a car', and 'dropped the wheel'?.

The first thing that comes to mind is contamination, of pads and/ or rotor.

The next thing is caliper alignment to rotor, followed by attachment points of caliper.

Some info on brakes here: http://www.mtb-guiding.co.uk/mtb/brakes

whitestar1

andrewjoseph wrote:

I'm sorry, i don't understand, what do you mean 'got let by a car', and 'dropped the wheel'?.

The first thing that comes to mind is contamination, of pads and/ or rotor.

The next thing is caliper alignment to rotor, followed by attachment points of caliper.

Some info on brakes here: http://www.mtb-guiding.co.uk/mtb/brakes

Well a driver reversed into me while I was trning left. Since than the rear brakes has been making the noise. I took the bike back to the store I got it from and they where kind enough to inspect the bike, they dropped the rear wheel out and checked the callipers/rotors/pads.

andrewjoseph

Ah, then there is the chance the frame is now out of alignment.

try a different bike shop.