Drum Type:Gunite - Drum Nos: 3271AX, 3800X 3774X, others /Stud Threads: 22mm / Axle Type: Steer / Dimensions: .5"thick - 1.25" dia. holeDrum Type: Conmet - Drum Nos: 107164, 107507, 107862, 107453, 10001781, 100783, 10005331, 10005332 / Stud Threads: 22mm