The easiest way to have floating rotors with the least amount of work. Made specifically for the BRP9383 Billet series hubs, one simple adapter takes care of all the work. Install the BRP9480 adapter and bolt the rotor on. All spacing will be the same as your conventional 3/8 floating rotor set up. Enjoy the performance of floating rotors with the lightweight advantage of 3/8 rotors. This now allows a 10-7/8 rear rotor on your 5 bolt hubs that was not previously an option.