Boo! In looking up the XP12s, I just found this on the web:
Quote:
READ THIS!
Carbotech brakes require their own, uncontaminated transfer layer made by Carbotech pads. If this is not done, you will not experience the full potential of the ceramic-kevlar compound.
You will need to do one of the following:
Resurface your old rotors
Completely remove the old transfer layer with a steel wire brush/flapper disc on a drill/grinder
New rotors
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I completely failed to do that. I just put them on running against the stock rotors (with 20K miles on the stock pads). I did run them for about 2 weeks on the street, where I get plenty of 70-to-20 decelerations. Could not being on fresh rotors be part of the problem I ran into?
And more broadly, does that hold any time you switch compounds? I put my stock pads back on last night, and noticed the brakes felt very weak for the first few miles. They felt almost like there was grease on the rotors. By the end of todays commute they were back to feeling like "normal" brakes.