Subaru Impreza 2004 Service Manual page 42

4) Set a micrometer 10 mm (0.39 in) inward of the
rotor outer perimeter, and then measure the disc
rotor thickness. If the thickness of disc rotor is out-
side the service limit, replace the disc rotor.
A
Standard
value
10 mm
14"
(0.39 in)
Disc rotor 18 mm
15"
thickness A (0.71 in)
20 mm
17"
(0.79 in)
Rear Disc Rotor
B
BR-00036
Service Disc outer
limit dia.
8.5 mm 266 mm
(0.335 in) (10.47 in)
16 mm 290 mm
(0.63 in) (11.42 in)
18 mm 316 mm
(0.71 in) (12.44 in)
BR-41
BRAKE