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      07-13-2012, 09:15 AM   #1
LiM3y
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Drives: 2008 E90 M3
Join Date: Jun 2009
Location: CT

Posts: 1,248
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Track Rotor Wear

I thought I would post this up.

My OEM rotors have done enough mileage (20K) to be close to replacing, based on previous changes. Being out of warranty, I bought a digital brake measuring caliper to check my rotor thickness. In two days at NJMP in the advanced group, 4 x 25 minute sessions, plus about 1.5K normal driving, I used 0.1 mm of brake rotor with PFC-01 pads. The right front rotor was at ~29.00, and now it is at ~28.90 (28.4 is the minimum thickness). The left rotor is more warn than the right, not surprisingly, by about 0.1mm difference. The measurements were consistent at the outer, middle and inside measuring at 8 locations (every two drilled lines).

The rotors are 30mm out of the box.

PS The car passed 066666 last night on the way home.... The new M3 can't come soon enough. I think I will pass on the Lime Rock Special Edition E92
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