Now you can get a cap-style vented disc rotor and cast aluminum caliper combined with the maintenance-free Vortex hub. This package will provide cooler running brakes and worry-free performance hubs. GalvX coating adds corrosion protection. Brake assembly includes ceramic pads, stainless steel backing plates, and all mounting hardware, including the caliper mounting bracket. 5 on 4-1/2 bolt pattern. Provide cooler running brakes GalvX coating for corrosion protection | Dexter 10" Vented Disc Brake With Vortex Hub