Noisy Disc Brake

[Broker]

My rear disc brake sytem (Magura) is extremely noisy when I brake and creates a vibration through the whole bicycle. Any advice on how to stop this.

[29thumbs]

could be the alignment, but first spray it with disc brake cleaner, rotors and pads, then try it.

if not, check pad alignment

[LazyTrailRider]

Alternatively, it could simply be the fact that you're using sintered (metal) pads (I'm willing to bet you are?). I had the same issue, then swopped back to resin pads - the noise and vibration disappeared.

[vanniri]

Alternatively, it could simply be the fact that you're using sintered (metal) pads (I'm willing to bet you are?). I had the same issue, then swopped back to resin pads - the noise and vibration disappeared.

 

 

+1

 

Metal pads have a place (wet nasty weather). Keep these pads handy if you replace them, when stage racing you might need them!

[zonker]

Alternatively, it could simply be the fact that you're using sintered (metal) pads (I'm willing to bet you are?). I had the same issue, then swopped back to resin pads - the noise and vibration disappeared.

i agree.the metal pads are definitely more noisy.the organic pads are much better even though they wont last as long as the metal pads

[Trapper]

Eish - I posted exactly the same question about 2 weeks ago.

 

I've handed my bike (brand new) with XT system back to the LBS. The LBS replaced the pads, then the disc, but as soon as it heats up, the problem occurs. All is correctly aligned, set up and bled.

 

They're now going to contact Shimano and Fuji to find out why? I've done only about 500km with the bike, and all was well until about 450km when the vibration started. Very very funny but not funny

[Trapper]

Oh,

 

and the other thing, if it is the pads, why is it only the rear brake causing the noise - the front works like a (silent) dream

[pimp]

Eish - I posted exactly the same question about 2 weeks ago.

 

I've handed my bike (brand new) with XT system back to the LBS. The LBS replaced the pads, then the disc, but as soon as it heats up, the problem occurs. All is correctly aligned, set up and bled.

 

They're now going to contact Shimano and Fuji to find out why? I've done only about 500km with the bike, and all was well until about 450km when the vibration started. Very very funny but not funny

 

I bet you ride a size 17 verry close?

[Hardtailrider]

For what it's worth, I'm running Avid Juicy 5 brakes and the front rotor (with sintered pads) also screams like a banshee but only when it gets wet. Doesn't seem to affect performance though. Apparently, this is a known "flaw" of the Juicy brakes when using sintered pads. Bottom line is that the problem's not confined to Magura brakes and is more likely to be related to the type of pad

[Harry Potter]

I was at our LBS when a client had the same problem they cleaned it end tried other pads, so he went for a smaller disc and the noise and vibration gone

[Trapper]

HEE-HAA!!!

 

Resolved - and you wont believe. It was acutally the rivets that hold the disc onto the middle mounting of the disc brake, that was a bit loose.

 

Up cheers to Alone at Solomon's who fixed this - after figuring it out together with the whizz from Shimano.

 

What to do to check yours: hold the brake tight, and push the bike lightly forwards and backwards, if teh wheel move a bit, check it out carefully. I first thought this movement was with the pads inside the caliper, but it is actually movement at the rivets.

 

So all great mystery's come to an end. No pad change or disc size required.

[DJR]

I like a good ending!

[Broker]

HEE-HAA!!!

 

Resolved - and you wont believe. It was acutally the rivets that hold the disc onto the middle mounting of the disc brake, that was a bit loose.

 

Up cheers to Alone at Solomon's who fixed this - after figuring it out together with the whizz from Shimano.

 

What to do to check yours: hold the brake tight, and push the bike lightly forwards and backwards, if teh wheel move a bit, check it out carefully. I first thought this movement was with the pads inside the caliper, but it is actually movement at the rivets.

 

So all great mystery's come to an end. No pad change or disc size required.

 

 

Thanks for all the info Guys.

 

Trapper what did they do to fix the movement on the rivets.

 

I have been informed by Northcliff Cycles (Thanks Alex) that the casing of the rear disk brake where it bolt onto the bike has been cracked. It seems that the alignment bolt was tightened to such an extend that it cracked the housing. Hope this will now resolve the issue. In future my 1st question to any LBS will be if they are using Torque wrenches to tighten bolts on bicycles and to see the paper with the recomended torque levels.

[DR ◣◢]

Thanks for the advice guys. Sitting with a Fuji Diamond Pro that has done 600kms and developed a horrible noise on the discs.

 

Popped the pads out to check and they are still perfect. Now to check all the mountings carefully.

[Trapper]

Thanks for all the info Guys.

 

Trapper what did they do to fix the movement on the rivets.

 

Replaced the disc (under warranty)

[Mecnic]

The mystery which is the humble disc brake.