So my disk brakes on my Checkpoint SL5 tend to sing, but not when I apply the brake. Only when the bike is basically sitting still and I'm moving the handlebars left and right, or gently rocking the bike back and forth. When I do the same thing with the brakes engaged, no noise. It's a quite high pitched little squeak. But no noise when the bike is rolling along, or when I apply the brakes under any kind of speed.
Anyone know why? and what is the fix? Do they need a good cleaning?
That happened on my sram guide brakes all the time because they'd constantly rub. Try truing the rotors and realigning the calipers and truing again and then replacing them with mechanicals.
With diligence and patience I understand one could achieve a rendition of The fifth movement of Bach’s Partita No. 2 in D minor for unaccompanied violin.
Self centering. If there is some resistance, the left pad can move outward while forcing the other pad inward. They're regulate the basic gap. If the pad barely touches but that touch doesn't generate enough force to move the other pad, ping ping ping. You can manually move the scraping pad inward with a business card or tool . They can also get out of alignment a touch relative to the disc. Same cure.
Yeah, I think the pads just barely glaze the rotors. I'm not sure if i'd worry about it. I have XT rotors now, coming from SLX ("upgraded" for the bling factor). I'd constantly have to true them to avoid the tiniest bit of rubbing. I still true them a lot, but i'm starting to care less and less. Nowadays I just grab the disc with my shirt and bend them by hand...
