Operation CHARM: Car repair manuals for everyone.

Brake Drum

BRAKE DRUMS Inside Diameter (New) 9.84 inch
Maximum Refinish Diameter/Discard Diameter*
*Brake drums and rotors have a refinish diameter or thickness dimension cast into them. This is a refinish dimension and allows for additional brake wear. Any drum or rotor which requires machining below the cast dimension should be discarded.
9.90 inch
Runout 0.001 inch