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Screeching brake pads


Gillie
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Howzit guys and gals

 

 

 

Have a pair of carbon wheels and thought I will do the right thing and got brake pads specifically for carbon wheels.

 

 

 

Problem is a moerse hi-pitched screeching sounds eminates when I apply the brakes.

 

 

 

Why and how can I fix it?

 

 

 

Thanks

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What pads are you using? as for example the Dura Ace pads squeal whereas the Corima pads don't....

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On vehicles they put a TINY coating of copper slip on the rear of the pad to avoid the friction that is created when you apply the brakes. I don't know if this will work with bikes but I presume it will. Once it is embedded into the pad it should be fine and not wash off. I am going to try it with my Stumpjumper as the same thing happens. Will let you know if it works or just messes up the system!

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On vehicles they put a TINY coating of copper slip on the rear of the pad to avoid the friction that is created when you apply the brakes. I don't know if this will work with bikes but I presume it will. Once it is embedded into the pad it should be fine and not wash off. I am going to try it with my Stumpjumper as the same thing happens. Will let you know if it works or just messes up the system!

 

 

 

He is talking about a road bike.

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What pads are you using? as for example the Dura Ace pads squeal whereas the Corima pads don't....

 

 

 

Dura-ace... just talked to the guy that fitted them, according to him the screeching will get better...

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I used to have a bit of squeal too. I use the Swisstop Yellow King Brake pads.

 

I first cleaned the rims, then I used a scotch brite pad to lightly "sand" the braking surface on the rim. After that I cleaned the brake tracks with acetone on a rag, just a wipe down. You can see if there is crud coming off the rims onto the rag with acetone, repeat if necessary. I found that the embedded old brake pad rubber still on the rim surface caused grabbing and set up the resonance.

 

The pads may still be contaminated so a quick wash and then a light sanding to clean off the old stuff.

 

Then re-install. I didn't do a leading edge setup on the pads I just sat them square.

 

No more squealing (they may squeal a little when you bed them in again, but should clear up in one short ride).

 

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Also check  they are toed in, meaning the front of the pads touches first, if the whole pad touches at once then it can cause a squeal.

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