Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Maximum Diameter/Discard Diameter


Discard Diameter ** 226.30 mm (8.909 inches)
Inside Diameter 225.12 mm (8.863 inches)
Maximum Refinish Diameter 226.57 mm (8.920 inches)
Runout 0.15 mm (0.006 inch)


** Note: 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.