Shimano Dura-Ace RT-CL900 Disc Brake Rotor with Lockring - 140mm, CenterLock, Silver

The Shimano Dura-Ace RT-CL900 is the top-tier road and gravel disc rotor, shared across the Dura-Ace and XTR groups. It uses Shimano's Ice-Tech Freeza construction: an aluminum core bonded between stainless steel braking surfaces, with a heat-dissipating finish that pulls temperature out of the rotor so braking fades less on long descents. This is the 140mm CenterLock version in silver, 1.8mm thick, and it ships with the internal-serration lockring you need to mount it. CenterLock speeds installation over six-bolt and keeps the hub interface stiff. A light, quiet, consistent rotor for performance disc-brake setups.