Rear Hydraulic Disc Brake Vibrating and making noise

whitestar1

Hi All
I had an accident today - idiot driver reverse left into me while I was turning left. No witnesses, no camera. He just didn't look! He was kind enough but what could I do? Any how the issue is my rear HD disc brake. It's making noise, vibrating. Went to Decathlon and the lads there were brilliant they looked over it. Even dropped the back wheel. At first it appears ok, but after a few miles its doing it again. It's a nasty vibration. Any ideas what I should do? I am riding a current Rockrider 8.0 with Juicy 3 disc brakes.

CarlosDSanchez

Hopefully you got his name, address, reg no and insurance details? Get 2 quotes from different bike shops to fix it and then make a claim on his insurance.

whitestar1

no witnesses so I just move on. Its the noise/vibration from the rear disc brake thats bothering me and I really need it sorted out ASAP. As noted the Decathlon staff were fab but the fault is still there.

CarlosDSanchez

Did the impact hit your back wheel/rotor/caliper? Maybe the rotor is slightly bent, caliper damaged or maybe the hub?

I would recomend posting in the mtb section, more people with disc brakes there who might have a better idea what the damage might be. Good luck and if you ever have another crash like that get the other persons details, even without witnesses you might get somewhere with their insurance or something.

whitestar1

CarlosDSanchez wrote:

Did the impact hit your back wheel/rotor/caliper? Maybe the rotor is slightly bent, caliper damaged or maybe the hub?

I would recomend posting in the mtb section, more people with disc brakes there who might have a better idea what the damage might be. Good luck and if you ever have another crash like that get the other persons details, even without witnesses you might get somewhere with their insurance or something.

Thanks for your advise mate

Blue Meanie

Put bike in a workstand and stand directly behind it so you can eyeball the rotor as the wheel rotates, is it bent (ie buckled like a rim). Can be bent (cold-set) back with gentle taps with a pedal spanner (or use rotor tool)
Check the rotor bolts are they all there, tight?
Remove and re-fit pads, they can dislodge with impact and could be sitting squint.

Although, I guess this is what the Decathlon guys did?

MattJWL

While standing behind the bike, check also the alignment of the caliper itself. If it's squiffy it'll give the same symptoms.

bails87

Is it vibrating while riding? Or while braking?

Is the disc rubbing while the brake is not being applied?

whitestar1

bails87 wrote:

Is it vibrating while riding? Or while braking?

Is the disc rubbing while the brake is not being applied?

Yes it is vibrating while braking but not all the time.