MP 3922XCast Brake DrumSKU: MP3922XSpecsFeaturesCross Condition: New ✅ FMVSS 121 Certified Brake Size: 16.5 x 7.00 Pilot Diameter: 8.78" Bolt Circle Diameter: 11.25" Bolt Holes: 10 Bolt Hole Size: 1.00" Drum Mount: Outboard/HPM Drum Weight: 102 lbs GAWR: 25,000 lbs