Brake noise after flat

[Caden]

Ok, this is weird.. After my recent flat, I fix it and go on my way but notice that the rear brake (the rear was the one that flatted) makes a sound during braking that it didn't make before. It is NOT a pulsing sound, and the wheel is true by visual evidence while spinning the wheel. The sound is like "shhhh". Did I simply get something on my rim/pads during my tube changing session?

[vuce]

probably it's alluminium from the rim, that's caught in the brake shoes. Nothing to worry about i think (my brakes always have and had this "shhh" sound ;))

[Retro Grouch]

Ok, this is weird.. After my recent flat, I fix it and go on my way but notice that the rear brake (the rear was the one that flatted) makes a sound during braking that it didn't make before. It is NOT a pulsing sound, and the wheel is true by visual evidence while spinning the wheel. The sound is like "shhhh". Did I simply get something on my rim/pads during my tube changing session?
Look carefully at your brakes and try to figure out what it is. If your brake pads happen to be touching your tire, for example, that can be real bad. It'll blow out your tire. Make sure that, when you replaced your wheel, you got it square in the dropouts.

[Caden]

Make sure that, when you replaced your wheel, you got it square in the dropouts.
Well, that's interesting - the pads aren't touching on either side BUT the left side is super close and the right side has a lot of space. The sound is not present while riding - only while applying the rear brake. So I know it's not from constant dragging, but *could* be from the rear not being centered.

[tommy d]

Well, that's interesting - the pads aren't touching on either side BUT the left side is super close and the right side has a lot of space. The sound is not present while riding - only while applying the rear brake. So I know it's not from constant dragging, but *could* be from the rear not being centered.
The rear is probably not your problem, look at the brake caliber itsself and it will probably be cocked one way or the other, it has a single mounting bolt and can pivot either way. Set it square and re-tighten.

[John M]

Well, that's interesting - the pads aren't touching on either side BUT the left side is super close and the right side has a lot of space. The sound is not present while riding - only while applying the rear brake. So I know it's not from constant dragging, but *could* be from the rear not being centered.

Like Retro suggested, your problem could be that you did not get the wheel centered (square) in the dropouts before fully tightening the quick-release. If you have vertical dropouts, make sure that the wheel is pushed fully up into the dropouts, if you have horizontal, you will have to do a bit of manual centering--check to see that the tire/wheel is centered between seatstays and chainstays.

It is possible that you knocked the brake out of center when removing or reinstalling the wheel. Check first to make sure the wheel is centered, in the dropouts, then check the brake centering.