[Autocross]

Quick question...Whenever I dismount from the bike and rock the bike left to right, wheels are not moving, I get a sound that's similar to a violin. Is this air in my brake lines?

 

[Gasp4Air]

Do you have disk brakes? Sound like rotors rubbing.

 

[Autocross]

oops thought everyone had disk brakes at this point. Yes they're Elixir CR's.

I adjust those things every other ride. I do the clamp down on the brake, loosen caliper bolts and then tighten to center. I've also cleaned the rotor with alcohol a few times.
That usually takes care of the squeaking after a short spin to pump the brakes, quiet.
But after a ride or two they are rubb/squeaking again. The violin music never really goes away though. I'm also hearing a high ptich but faint squeal when pedaling that doens't sound like its coming from the rotor, more like the bb area.
I've got one noisy bike. I wonder if this down to air in the system.

 

[captainjoon]

Sometimes they rub lightly...it's common. It's not a big issue.

The squeal from pedaling is probably due to lack of lubrication. It would be good to take the whole thing apart, the BB, crank and pedals and grease the threads and spindle.

 

[Eric Z]

wheels are not moving, I get a sound that's similar to a violin. Is this air in my brake lines?

if your wheels are not moving, can't be your rotors then.

 

[basso4735]

if your wheels are not moving, can't be your rotors then.

When he moves it to the side, he could be moving the wheels very slightly. It definitely sounds like rotor rub.

 

[tshulthise]

if it goes away when you clean the brakes its the rotors. I just hose mine off after each ride then blow them dry with compressed air. They violin when they are dirty and are quiet after they are cleaned. Just how it is.

 

[Autocross]

nope cleaned the rotors, violins are still there.

I ordered the Muc-Off Disc brake cleaner, are these products any better than using rubbing alcohol?

 

[Mount Dora Cycles]

Rubbing alcohol works fine on rotors. Try organic pads for a quieter ride. If it still annoys you go to V-brakes.