These pulley rotors are for custom Harley Davidson motorcycles (HD), custom choppers, bobbers and most custom motorcycles with Harley type Softail or rigid frames. These pulley brakes are precision machined from billet aluminum for strength and durability. Pulley rotor combo kit includes: custom four piston rear caliper, caliper bracket, 65 tooth pulley-rotor, anchor rod, weld-on tab and necessary hardware. Pulley rotors are available only for 1-1/2” belts. These custom chopper brakes perfectly match our Three Spoke Cut Wheels, Three Spoke Wheels and Three Spoke Cut Rotors.