Operation CHARM: Car repair manuals for everyone.

Brake Drum

Discard Diameter
All brake drums and rotors have a discard dimension cast into them. This is a wear dimension and not a refinish dimension. Any drum or rotor which does not meet the specification should be replaced.
8.909 Inch (in)
Inside Diameter 8.863 Inch (in)
Maximum Refinish Diameter 8.92 Inch (in)
Runout 0.006 Inch (in)