My cycle would squeak bad when i stopped or was rolling my bike to a stop. So i installed new rear and front brakes. Now my bike shuts up when I stop, but its squeaking non stop while I ride. As soon as i tap the front brake they stop, but when i let go it starts again. How can I get rid of this?
There are two likely sources. One is fretting between the back of the pad and the piston. There is a grease-like you can apply to the back of the pad which will damp out the vibrations that cause the squeaking. If that doesn't do the trick, you can try putting a slight chamfer on the edges of the pads.
Buster is correct on this, the bevel on the following edge(back) will allow dirt and brake dust to escape, there is very little clearance and the dirt will make the pads rub and squeak. If it is only like a small hissing sound, as the pads wear in it will go away. Did you bleed the brakes when you put the new pads on? Remember, the old pads where thinner and the pistons needed to extend more and more as the old pads wore, try bleeding the brakes and resetting the pistons, (pump them up to contact). It is always important to bleed the caliper regularly to keep fresh clean fluid in the pistons as the heat of friction(braking) will over time degrade the fluid and make the piston retraction slow and non-uniform on multi-piston set-ups. Sometimes if you do a lot of hard riding, you can slightly warp the rotors and they will rub and squeak no matter what you do. In that case, if you can afford it, buy some floating rotors and install them, they really work from what I am told by people who have them. Best of luck and Ride it like Ya stole it!
It could be that there is brake dust contamination, you can clean this off with brake cleaner, you might also want to clean the pistons of the calipers. Some older bikes have anti-squeal shims that fit between the pad and the piston, these are normally used in conjunction with a copper grease. Third option, warped discs, put the bike on a stand and spin the wheel, if the squeaking or rubbing is not constant there is a chance the disc is warped through heat.
