47 / 64 in. on 1982 and later)
Braking performance is greatly affected by the disc run-out. Lateral run-out must not exceed 0.005 in. total. Discs should not be refinished to a thickness of less than 1.215 in. (
Should it become necessary to replace the disc, the rivets that attach the disc to its hub must be drilled out. The replacement disc does not have to be riveted to the hub as the lug nuts adequately secure both.