Designed for the demands of modern road, gravel and XC racing, the Shimano RT-CL900 ICE TECHNOLOGIES FREEZA Disc Rotor delivers exceptional braking consistency, outstanding heat management and whisper-quiet performance on even the longest descents. As Shimano’s flagship DURA-ACE rotor, the RT-CL900 is engineered to maintain confident braking under extreme conditions while remaining incredibly lightweight. 

The updated rotor arm design improves rigidity to minimise heat-induced rotor deformation, reducing brake rub and unwanted noise when descending at speed. Combined with Shimano’s proven ICE TECHNOLOGIES FREEZA construction and heat-dissipating paint, the three-layer stainless steel and aluminium sandwich design efficiently sheds heat to maintain consistent braking power lap after lap. 

Available in 140mm, 160mm, 180mm and 203mm, the RT-CL900 is compatible with both resin and metal brake pads and utilises Shimano’s simple Center Lock interface for fast installation and precise rotor alignment. Whether you’re racing, tackling alpine climbs or riding demanding gravel adventures, the RT-CL900 delivers the braking confidence expected from Shimano’s premier road groupset. 

Why you’ll love it

• Shimano DURA-ACE RT-CL900 premium Center Lock disc rotor
• ICE TECHNOLOGIES FREEZA construction maximises heat dissipation
• Heat-dissipating paint further improves cooling during sustained braking
• Revised rotor arm design reduces vibration and brake noise
• Consistent braking performance on long, steep descents
• Lightweight stainless steel and aluminium sandwich construction
• Compatible with both resin and metal brake pads
• Available in 140mm, 160mm, 180mm and 203mm sizes
• Center Lock mounting system for quick installation and precise alignment