Brakes lacking stopping power

echowitch

I've noticed that my front brake was losing power stopping. It does work but seems to struggle to catch and hold, mostly slipping through. I had the pads cleaned and sanded, which didn't seem to do the trick, even had the caliper replaced, (including new pads) and fully bled, but still nothing.

The only thing I can think now is the rotor is somehow at fault. How I can I tell if the rotor is worn and needs to be replaced ?

cooldad

Did you clean the rotor?

echowitch

Yep I've cleaned it twice, and the LBS did it today when they swapped the caliper and bled the brake. Still lacking in comparison to what it was like several weeks ago. I had to swap the caliper as the old one had a defective piston so it was only applying pressure on one side, not both sides. There is some scoring on the rotor because of that.

poah

echowitch wrote:

I
The only thing I can think now is the rotor is somehow at fault. How I can I tell if the rotor is worn and needs to be replaced ?

swap it for another one :roll:

The Rookie

If the lever feel is 'right' then it must be an issue with the disc/pad interface.

apple eater

i have this problem, sometimes, i found out it is because i spent too much times with the brakes on and they were over heating plus they are just basic clark pads and basic cheap rotors and i'm quite heavy (95 ish kgs)

desmorrow

you should eat more apples then...

montyburns56

Sometimes rotors end up getting a polished surface due to brake rubbing and there's not much you can do, but replace them.

mrmonkfinger

Try giving the rotor a light rub with some fine sandpaper or steel will, then a wipe of with some ipa.