Chris King R45D Rear Hub Legendary Hubs If you're looking to build up a fresh wheel, you'll want to start with a legendary hub. The Chris King R45D Front Hub combines a low-drag 45-tooth Ring Drive system, a lightweight hub body, and legendary made-in-house bearings. The result is the increased power and modulation of disc brakes, the fast, smooth rolling speed of our bearings, and the superior responsiveness of our Ring Drive engagement system when you put the power down. Features Combines a low-drag 45-tooth Ring Drive system with legendary made-in-house bearings Increased power and modulation of disc brakes Easily serviceable and completely rebuildable SPECIFICATIONSHub Size12x142mm Spoke Interface J-Bend Hub Drilling24H, 28H, 32HBrake Type Center Lock Cassette Compatibility Hyper Glide, SRAM XDR | Chris King | R45D Rear Hub 12 X 142Mm Center-Lock Xdr | Black | 28H