Sounds like a stupid question I know but I have never replaced worn rotors.
I have some SH (from here) old style Hope Mono Minis the black and gold ones. After swapping the wheels today I noticed that there is a groove running all the way round both discs. Its had to explain where the groove is, its on the arms that connect the centre of the rotor (where the bolts are) to the outer braking surface. It looks like the pads have been using these arms for braking and not just the outer circular bit is this normal?
I think his may be causing my front brake to have excessive leaver travel. I dont have any other discs this size or know anybody who has and dont want to just go and buy new rotors to try it out. Does anybody have any experience with this.
BTW I am not complaining about the sale or the condition the brakes were in when I got them just trying to diagnose the problem.