This durable two-piece disc brake rotor is compatible with AFS and Centre Lock hubs and is suitable for use with all types of pad compounds. Its robust alloy spider has been put through a CNC-machining process, which shaves off any unnecessary material for a superior strength to weight ratio. Campagnolo has also equipped this version with a steel braking surface that's designed to stop the brake system from overheating even when cycling down the steepest of descents or tightest of corners. Developed to be incredibly aerodynamic, its rounded edges on the disc prevent any injuries or cuts if you were to come into contact with the disc edge. As a result, you'll have increased confidence when using your brakes and benefit from smooth, consistent and powerful operation, wherever your ride takes you. Technologies: Rounded Corners: Safe and easy wheel mounting. Heat Resistant: The disc was designed to rapidly dissipate the heat. The aluminium spider also contributes to preventing the hub from overheating. The Rivets are Positioned Far Away From the Caliper: There is less thermal stress at the more delicate points. Manufacturer's Part Number: CPB992A Silver 140mm CPB992B Silver 160mm