Bicycle Mechanics - Canti's sqeeking really loud, how can I fix them?
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My wife has a older Trek 800 that she uses for a path bike. The brakes are canti's. Both the front and back now squeal so loud when she hits her brakes it hurts our ears. I have tried to adjust them, clean the rims with rubbing alcohol, I don't know what else to do. From what i can see the pads have tons of life left in them, but maby I am wrong. Any other suggestions, before I take it to a shop?
09-12-09, 10:19 PM
If pad material is superhard or surface is glazed, I'd just change them for something like Koolstops. If there is any adjustability available, slightly toeing them in seems to help.
09-12-09, 10:25 PM
Toe them in a nickels worth, if they are really loud.
09-12-09, 11:14 PM
ps (and w) make good suggestions. Since you come from an area where it rains, you might try the "salmon-colored" version of Kool-stops.
Ill try that tomorrow. The bike is a 97 model, and I think the pads are original, that was one of the possible answers I was looking for, as to whether they go bad with age?
This problem is driving me nuts, to the point where I am determined to figure it out. I just got done lightly sanding the rim's and the brake pads to make sure there was no build up or glazing. That did not work. I think I am going to buy at least one set of new pads, try them on the front and see if that fixes the problem.
09-13-09, 01:42 PM
I know this is counterintuitive, but have you checked the headset for looseness? I fixed the squeaky canti's on my cyclocross/touring bike with a good toe-in and headset adjustment.
I would also just keep scuffing/de-glazing the pads rather than replacing. "Bike path" bikes rarely wear down their pads to the point where they need replacement.
09-13-09, 02:01 PM
If trying all of the above doesn't affect the squeal, then you could have flex at the forks that can be fixed by a brake booster (http://www.bikepro.com/products/brakes/brake_boost.html).
I'd try all of the others -- including checking for headset play -- first, but keep this in mind. It has solved canti squeal issues where nothing else worked.
09-16-09, 09:59 PM
Don't ride with her anymore.....
Or sand the pads usually helps. But if they're old, buy new ones. Lots of the compounds nowadays work much better and don't squeal.
09-17-09, 05:45 AM
12 to ??? year old (who knows how long they sat in a warehouse before being installed) brake pads would be rock hard, replace them and go from there. Wrap a rubberband around the front tip of the pads to set toe-in, you only need 1-2mm normally, if at all.
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