06/01/2026
BRAKE ROTOR WEAR… when is it too much?
I thought I would do this Post because almost every week someone tells me they have a suspension clunk. They then grab their front brake lever and violently pull the bike back and forth, and can feel movement.
I usually take my left thumb and bridge it between the upper triple clamp and the frame and then gently push the bike back-and-forth with my right hand while holding the brake lever. Although this is no replacement for proper elevated inspection and maintenance, this will often tell you if there’s excessive play in the steering head bearings.
But the biggest culprit is usually play between the brake outer rotor and the inner carrier. Again have the owner of the bike repeat this action and put a thumb between the carrier and the rotor across one of the buttons and any play will be immediately apparent.
If I do feel play here in the rotary direction of force, I will usually recommend replacement of the rotor, or if parts are available, replace the buttons or the carrier.