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Disc brake brake squealing woes finally solved

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Disc brake brake squealing woes finally solved

Old 08-16-19, 01:18 AM
Bike Jedi
Join Date: May 2019
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Originally Posted by TimothyH View Post
Lay the sandpaper on a hard, flat, very smooth surface and run the parts across the sandpaper in a figure-8 motion.

You don't want to remove significant material. All you want to do is break through the glaze.


Well I tried that with another pair, just to see and feel, but at the same time, there was a new rotor exchanged and went up a size in rotors. I figured if I toast that pair of pads trying again, I can run down and grab some new ones, even though those are fairly new, and REI is close at $10 bucks a pop if I mess it up again. The brakes weren't really squeaking to begin with, but there was a hard sound at the end of braking, but not why I was doing it at all. I was doing it to see if I mess the pads up again trying. Didn't do figure 8 but did do circular this time instead of back and forth. Maybe did different directions in circles, can't recall now, but did it very lightly this time and only on flat surface.

Combination of everything made my cheap entry level hydro's pretty dang good suddenly. Adding a 180 rotor to the front on my current setup made a night and day difference so I don't know what was the true variable to make it all nicer, but the brakes are running the best and quietest they ever have since I owned the bike. That's new rotors all around, new pads on back, and lightly sanded front pads. Super, super, quiet now.

Living in mountain riding, I wish that I switched over to a 180 front rotor a long time ago too. It's actually such a big difference and how much more dependent and I can get on the front brake now. Wow! I will never be at less than 180mm front rotor again if I can avoid it.

My new build has 2 180's on it, full SLX, and all Icetech. I can't wait to descend on it and see and feel what that is really like

The short of the long story shared is...perhaps you are correct and it will work, I just didn't know what I was doing and think I was dealing with bad pads anyway and trying to salvage something I shouldn't have been. I think for now on my new standard is putting in new disk brake pads with every new rotor regardless. I cut at tad into the new rotor with those other pads I tried to salvage and handled the entire procedure like an ape. So now I also learned not to take chances like that on new rotors and just throw on new pads anyway

Bike lessons get to be expensive over time, but it's starting to become pretty fun working out a lot of those little lessons and starting to have a pretty good skill set from it all. The learning curve picked up here helps tremendously. If I couldn't collaborate with people on that, I would have probably tossed the idea as "no good" and not tried again. Glad I mentioned something. Thanks for the tip.
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