Disc Brake Squeal and Vibration STILL!

Just had my brakes serviced and bled, Now my rear brakes squeals like nothing I have ever heard and there is serious vibration through the frame, The guy in the shop told me to bed them in for 10 miles so i did 20-30 miles easy riding and braking.
Yesterday I went out for a downhill ride and had to stop because it was getting embarrassing braking with the noises they were making! Anyone got any tips on how to stop this or whats causing it?
I have been back to the shop and they suggested roughing up the pads again then trying to re bed? or book it back in with them next week.
Cheers
Rich
Yesterday I went out for a downhill ride and had to stop because it was getting embarrassing braking with the noises they were making! Anyone got any tips on how to stop this or whats causing it?
I have been back to the shop and they suggested roughing up the pads again then trying to re bed? or book it back in with them next week.
Cheers
Rich
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Sand the pads, and clean the rotor and start again. Also check all the bolts are nice and tight.
VOODOO CANZO
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Cheers
Rich
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
VOODOO CANZO
Come and see me at https://www.facebook.com/biketyke/
This is really annoying me now please help!!
and what did you use to clean them with?
Parktools :?:SheldonBrown
Have changed rotors, pads, and even callipers.
Just switched over to another dear wheel, and hey presto vibration has gone.
Seems like something in the rear hub is resonating and causing the vibration.
Going to the shop tomorrow to see if this is cause.
Interestingly the looser I have the QR the better the vibration gets.
hope this helps!
Before you try to bed them in, sand the pads down. Take the rotor off, and clean it in IPA or similar substitute. Then sand it down, moving outwards from the centre, so the scratches go at 90° to the scratches caused by the pads.
IF you do all of this, and it STILL squeals, then go to your LBS, and get them to re-face the disc mount, and repeat the whole process again. Is a pain, but brakes are important!
Sick to the power of rad
Fix it 'till it's broke
Bear in mind that change of callipers, pads, and rotors has not helped here.
I have done some further tinkering though and fixed this issue for myself.
Found that (in my case) the rear hub was slightly loose. Have tightened this up finger tight (I don't have a cone tool) and the vibration has all but gone.
Will get to the shop tomorrow to get the hub properly tightened but this has been a long standing issue for me and is now resolved.
This was very different from noisy brakes as the vibration was so bad it actually prevented me from feeling the bikes movement throught the bars/pedals etc.
I also found reference on the Magura site to this vibration issue, and they rec'd looking at the hub as an issue.
All fixed.
Thanks for input though, often helps to get other idea's.
More info here: http://www.bikeradar.com/static/about/ "