Shimano Deore XT RT-M800-S Center Lock Disc Brake Rotor with External Lock Ring 160mmThe Shimano Deore XT RT-M800-S Center Lock Disc Brake Rotor uses Shimano FREEZA technology to boost heat dissipation and reduce fade. The Easy disc brake rotor installation uses a spline mount and lock ring. This model is 160mm and is compatible with metal and resin brake pads.192790442235