The Chris King R45D Front Hub is designed for powerful braking and smooth rolling. This hub was made with a center lock connection to add to the power and modulation of disc brake performance. It also comes with their in house made heat treated ceramic bearings which are incredibly durable, offering a long life of frictionless performance. A one piece axle delivers excellent stiffness and more power. Riders can count on all-around performance from low weight to great traction and power transfer. The Chris King R45D Hub gives your bike a great sound, long life, and extra speed.