• Drum Discard Diameter *

243.59 mm

9.59 in

• Drum Maximum Allowable Diameter After Refinish

242.82 mm

9.56 in

• Inside Diameter (new)

241.3 mm

9.50 in

• Drum Maximum Allowable Radial Runout

0.15 mm

0.006 in

• Drum Maximum Allowable Scoring

1.50 mm

0.059 in

* All brake drums have a discard dimension cast into them. Replace any drum that does not meet this specification. After refinishing the drum, replace any drum that does not meet the maximum or discard diameter specifications.