Mountain Biking - Disc Brake Question

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my58vw
10-01-04, 10:17 PM
I have a hynes hydrolic setup on my jekyll. Today I started getting an annoying high pitched squeling noise at work. I am going to send it to the shop but I was wondering what I am in for. I am also having problems with the back end, it is making a funny clicking noise when the wheel comes to a certain point in the rotation. What do you think... any ideas? Thanks

namaste1978
10-02-04, 01:52 AM
So my58vw dude, the squeling noise on your front brake is more than likely due to some contaminates getting on your pads (dirt, oil, grease mud). Most pads require break in. You need to buy a good quality brake rotor cleaner like "speed clean" to keep the rotors clean. Acetone works fine if you can't buy any. This should fix your problems. As for the "clicking" in the rear end,it's more than likely just an out of true rotor that needs to be straightend. Any shop can do it for you....
Reggie
10-02-04, 05:19 AM
really? squeaky nosie on disc brake is because of contamination on the pads?

ChiliDog
10-02-04, 09:36 AM
No pads on disc brakes. Take it to the shop.
bac
10-02-04, 10:13 AM
No pads on disc brakes. Take it to the shop.

Please don't give advice if you have absolutely no idea as to what you type.
catatonic
10-02-04, 10:22 AM
No pads on disc brakes. Take it to the shop.


there are pads inside the calipers. All brakes have a pad of some sort, even drum brakes.

Now that aside, the pads on disc brakes are made to very fine tolerances, as is your disc...even higher tolerances than bike rims and standard brake pads. What this means is smaller peices of grit just might be large enough to gouge into your disc, that's the squealing sound you hear.

What's key is to keep your disc clean. I use isopropyl alcohol myself, only beacuse I have practically liters of the stuff sitting around. Also make sure your calipers and padds are of reasonable condition. Calipers will go out over time (many years, not months or such), and pads will wear down, or possibly chip, like mine did when I was being a gorilla and practically slamming my wheel back on, and managed to get that right angle that I chipped a corner off my pad.

when pads get worn or damaged best bet is to replace the pad as soon as you can.