C 2500 Truck 2WD V8-305 50L (1990) Brake Rotor/Disc Information - Technical Service Bulletins
MACHINING
Since accurate control of the rotor tolerances is necessary for proper performance of the disc brakes, machining of the rotor should be done only
with precision equipment.
NOTE: 1 inch = 25.4mm, so if your micrometer measures in inches and the specified thickness on the disc is in millimeters, convert millimeters to
inches by dividing the specified number of millimeters by 25.4.
Example: Specification on disc is 17.8 mm.
Dividing 17.8mm by 25.4mm/in = 17.8/25.4 = 0.70 inches.