Drum Brake Component Specifications

BRAKE DRUMS
Inside Diameter (New) 225.25 mm (8.868 in)
Maximum Allowable Radial Runout 0.104 mm (0.004 in)
Maximum Diameter (After Refinish) 225.78 mm (8.889 in)
Discard Diameter* 226.31 mm (8.909 in)

Wheel Cylinder Bore Diameter 22.20 mm (0.87 in)

* All brake drums and rotors have a discard dimension cast into them. Replace any drum or rotor that does not meet this specification. After refinishing the drum or rotor, replace any drum or rotor that does not meet the maximum diameter or minimum thickness after refinish specification.