Hi just joined the forum... stevelew60

[stevelew60]

Hi folks, I need some advice/expertise. I have a Boardman Hybrid Pro and I have brake squeal front and back which started at the same time.
I've changed the pads twice. first sintered then organic, I've cleaned and sanded the discs and adjusted alignment. I've done this several times now and although the first application of the brakes is silent they both then start squealing.
I've just done all the above an hour ago yet again and still the same.

Would appreciate any help advice, am I missing something?

Cheers
Stevelew60

 

[Bianchi boy]

Hi Steve, sorry can't help with the breaks, but someone will be along shortly, in the meantime, And happy

 

[stevelew60]

Ok thanks for the reply anyway...

 

[Sharky]

Haven't a clue with disc brakes, but this seems plausible:-

http://www.pinkbike.com/news/Tech-Tuesday-Silence-That-Squeaky-Disc-Brake-2011.html

 

[Captain Scarlet]

Hello and welcome, sadly I'm not that mechanically minded to offer any help.

 

[Saluki]

to CC. My disc brakes squeak from time to time on a ride but once home and I get to have a good look at them, they stop squeaking only to start again in a couple of rides.
If it persists, have a chat with your LBS

 

[Mrs M]

 

[Pat "5mph"]

Welcome!
Can't help, my disks squeal too

 

[welsh dragon]

Hello. Welcome to the forum

 

[_aD]

I feel I've been a bit remiss about welcoming our recent influx of new members. CycleChat is a serious place and newcomers deserve a heartfelt, personal and serious welcome.
Two out of three aint bad.
Glad to have you on board, stevelew60!

 

[bikeman66]

Hi folks, I need some advice/expertise. I have a Boardman Hybrid Pro and I have brake squeal front and back which started at the same time.
I've changed the pads twice. first sintered then organic, I've cleaned and sanded the discs and adjusted alignment. I've done this several times now and although the first application of the brakes is silent they both then start squealing.
I've just done all the above an hour ago yet again and still the same.

Would appreciate any help advice, am I missing something?

Cheers
Stevelew60

Hi Steve,

Welcome to Cyclechat........a great place to be.

With regard to your noisy brakes, for a start, make sure everything that should be tight IS tight and correctly torqued. Squeal, like any noise, is caused by vibration, so making sure nothing is loose is a good place to begin. Next and probably most likely to help would be pop the pads out of the calipers and apply a fairly generous smear of high melting point copper grease to the back of the pad (i.e the bit that is in contact with the piston. In the caliper). Obviously take care not to get any grease on the friction surfaces when putting the pads back in. I'm 99% sure this will help, if not eliminate, the issue. Let us know how you get on.

 

[stevelew60]

Hi Steve,

Welcome to Cyclechat........a great place to be.

With regard to your noisy brakes, for a start, make sure everything that should be tight IS tight and correctly torqued. Squeal, like any noise, is caused by vibration, so making sure nothing is loose is a good place to begin. Next and probably most likely to help would be pop the pads out of the calipers and apply a fairly generous smear of high melting point copper grease to the back of the pad (i.e the bit that is in contact with the piston. In the caliper). Obviously take care not to get any grease on the friction surfaces when putting the pads back in. I'm 99% sure this will help, if not eliminate, the issue. Let us know how you get on.

Thanks for the advice I've now found the problem, piston seals have gone on both front and back calipers - Shimano not yet a year old !!! Luckily covered by warranty so getting repairs done at nil cost.
This is something to look out for, if you apply the brake lever continuously and look at the piston head you'll see it bubbling out.

 

[_aD]

This is something to look out for, if you apply the brake lever continuously and look at the piston head you'll see it bubbling out.

The brakes! They're melting!