1 3/4"-27 Spline; 6 on 5 1/4" w/ (6) 1/4" bolts and nuts
Micro sprint rear brake rotor.
6 7/8" Dia. X 1/8" Thick; Drilled Steel; Includes 5-bolt installation kit.
3/8" Thick; Aluminum; Includes longer 5-bolt installation kit.