Brake Drum

All drums have a discard dimension cast into them. This is a wear dimension and not a refinish dimension. Any drum which does not meet the specification should be replaced.

Inside Diameter	7.879 Inch (in)
Runout	0.006 Inch (in)
Maximum Re-bore Diameter	7.899 Inch (in)
Discard Diameter	7.929 Inch (in)