Shimano XTR RT-CL900 Ice-Tech Centerlock 203mm Disc Rotor

Built for riders who demand uncompromising braking performance, the Shimano RT-CL900-M  ICE TECHNOLOGIES FREEZA Disc Rotor delivers exceptional stopping power, superior heat management and quieter braking on the longest, steepest descents. As Shimano’s flagship DURA-ACE rotor, it’s trusted by road racers, gravel riders and XC mountain bikers looking for maximum braking consistency without unnecessary weight. 

The RT-CL900-M features Shimano’s proven ICE TECHNOLOGIES FREEZA construction, combining stainless steel outer layers with an aluminium core to rapidly dissipate heat. An updated rotor arm profile increases stiffness to minimise heat-induced rotor distortion, helping reduce brake rub and unwanted noise during prolonged braking. The addition of heat-dissipating paint further enhances cooling, ensuring reliable performance when it matters most. 

This version includes an externally serrated aluminium Center Lock lockring, making it ideal for hubs with larger thru-axles while allowing quick installation using a Hollowtech II bottom bracket tool. Compatible with both resin and metal brake pads, it’s the perfect upgrade for riders seeking confident braking in all conditions. 

Why you’ll love it

• Premium Shimano DURA-ACE RT-CL900-M disc rotor
• ICE TECHNOLOGIES FREEZA construction for outstanding heat dissipation
• Heat-dissipating paint improves cooling on sustained descents
• Revised rotor arm design reduces vibration and brake noise
• Delivers powerful, consistent braking under heavy loads
• Stainless steel and aluminium sandwich construction balances strength and weight
• Compatible with resin and metal brake pads
• Center Lock mounting system for fast, precise installation
• Includes externally serrated aluminium lockring
• Ideal for road, gravel, XC and performance mountain bike applications