The Shimano RT-CL900 Ice Tech FREEZA Brake Rotor is a high-performance addition to any rider's bike. Made from Shimano's renowned Ice Design, it offers superior heat stability and braking performance compared to traditional rotors. The external lockring design enhances braking reliability, reduces wear, and improves feel during deceleration. This rotor is compatible with the latest Shimano brake calipers and rotors, ensuring optimal braking power and control. With its 180/203mm dimensions, it offers ample space for larger rotors without compromising on stability or performance. Invest in this superior brake rotor for enhanced braking confidence on icy surfaces.