Agonizing Brake Noise!!
I've got a 2007 KHS XC104 w/factory Winzip cable disc, 6" rotors and tektro alloy levers. Anyhow, the bike stops on a dime but everyone in a 1mi radius knows when I hit my brakes. I'm talking loud squeling noise! I had my LBS check'em out and they couldn't duplicate the noise which has me wondering if my weight is an issue which is 275lbs? The guy checking out my bike weighed roughly 180-220? Now with that said, I also have a 2013 Cannondale Trail 6 and it admits almost zero brake noise? Any thoughts? I really love riding my KHS but hate the brake noise.
Do you have organic pads? My brakes got a lot quiter when I switched to sintered pads.
Usually the other way round in my experience, sintered pads are better in the wet and longer lasting than organic but are very prone to squealing and vibrations. Could be that your organics were a bit contaminated.
Originally Posted by Learux
To the OP, have you had cleaned the rotors and had the pads out and checked them for wear / overheating, they could have become contaminated. I would try a new set of organic pads and see how it goes, they are pretty cheap. Is it both brakes or just one? other stuff - check the caliper alignment, check the rotors aren't bent etc.
One thing to note with 100% organic pads, if you ride a lot in mud they can wear out very rapidly indeed, you could also try semi metalic pads - if you don't like the feel of the organic pads.
Originally Posted by SimpleJon
My LBS adjusted the brakes and the rotors seem true but the pads are old. I just never thought about the pads since the bike stops really well. Anyhow, I'm going to replace the pads and see if that helps...probably Organic.
Did replacing pads works?
So did replacing your pads help?
I found that in my case it was almost always brake pad contamination. Even touching your rotors with your fingers can transfer oils that will contaminate your pads. Here is the technique I've used on a couple of occasions (front and rear) with great success:
1. Put on a pair of latex gloves
2. Remove your existing pads (remove retainer pin and unscrew pad holder bolt)
3. Using 120-150 grit sandpaper and lightly sand the pads until they are clean (you see the original compound).
4. Using an even finer grit sandpaper you may want to lightly sand the contact points on your rotors (mainly just to get rid of any **** or build up) - be careful not to scratch!
5. Use alcohol or acetone and paper towels and clean the rotors of any fine particles
6. Ditto your pads (contact side) - using a new, clean towel of course.
7. Re-install the pads being really carefully not to touch their contact side.
8. Don't forget to re-install the retainer pin on the pad holder bolt.
9. CRITICAL: Ride around your driveway and reset the pads (build up some speed (10-15 mph) then brake hard. Repeat a few times. Watch out when setting your front brake as they will get stronger after each attempt).
That's it. Squeal/moan should be gone.
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If you have already been using those pads for sometime ... I would say that it is contamination ... I spray disc brake cleaner over the pads, using a clean rag, just wipe over it as much as you can, then using a copper pipe soldering torch ...
heat the pads directly for about 10-15 seconds.
The heat from the torch will burn off any oil residue left behind. Wipe the pads over again with a clean cloth. Let it cool down first eh!
try anti-squeal on the backs of the pads
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