Shimano RT-CL900 140mm Center Lock Disc Brake Rotor | DURA-ACE | ICE TECHNOLOGIES FREEZA | Internal Lock Ring
Shimano RT-CL900 140mm Center Lock Disc Brake Rotor | DURA-ACE
Shimano's flagship road disc brake rotor delivers exceptional heat management, whisper-quiet braking, and race-ready performance.
The Shimano RT-CL900 is the premium disc brake rotor developed for the latest DURA-ACE road groupsets, offering outstanding braking consistency, reduced noise, and advanced cooling performance. Whether you're racing, descending mountain passes, or pushing the pace on fast gravel roads, the RT-CL900 delivers confident braking with minimal fade.
At the heart of the rotor is Shimano's ICE TECHNOLOGIES FREEZA construction, combining stainless steel braking surfaces with an aluminum core and advanced cooling technologies to rapidly dissipate heat. Lower rotor temperatures help maintain braking consistency while extending brake pad life during prolonged descents.
The RT-CL900 also features a redesigned, reinforced rotor arm that minimizes heat-induced deformation and vibration. Combined with Shimano's heat dissipation coating, the result is one of the quietest braking experiences Shimano has ever produced without sacrificing weight or braking power.
This version includes a 140mm Center Lock rotor and a Shimano Center Lock internal serration lock ring for installation on compatible hubs.
Key Features
- Shimano DURA-ACE RT-CL900 premium disc brake rotor
- 140mm rotor diameter
- Center Lock mounting system
- ICE TECHNOLOGIES FREEZA cooling construction
- Advanced heat dissipation coating
- Reinforced rotor arm design reduces vibration and noise
- Excellent braking consistency on long descents
- Lightweight performance construction
- Includes Center Lock internal serration lock ring
Why Riders Choose the RT-CL900
- Shimano's highest-performance road disc brake rotor
- Exceptional cooling minimizes brake fade
- Noticeably quieter braking under heavy use
- Excellent modulation and braking control
- Lightweight design for premium road and gravel bikes
- Trusted by competitive road cyclists and endurance riders
Technical Specifications
- Brand: Shimano
- Series: DURA-ACE
- Model: RT-CL900
- Rotor Diameter: 140mm
- Mounting Standard: Center Lock
- Cooling Technology: ICE TECHNOLOGIES FREEZA
- Heat Management: Heat Dissipation Coating
- Rotor Construction: Stainless Steel / Aluminum / Stainless Steel
- Included Lock Ring: Internal Serration Center Lock Lock Ring
- Brake Pad Compatibility: Resin and Metallic (Sintered)
- Application: Hydraulic and Mechanical Disc Brake Systems
- Manufacturer Product Code: IRTCL900SSI
- UPC: 192790232706
Ideal For
- Road racing
- Endurance road cycling
- Gravel riding
- Cyclocross
- Performance all-road bikes
- Long mountain descents
- Premium lightweight bike builds
Before You Buy
- This listing is for one (1) 140mm Center Lock disc brake rotor.
- Compatible only with Center Lock hubs.
- Not compatible with traditional 6-bolt hub mounting systems.
- An internal serration Center Lock lock ring is included.
- Compatible with both resin and metallic brake pads.
- Verify that your frame, fork, brake caliper, and adapter are designed for a 140mm rotor before ordering.
- The included internal lock ring installs using a Shimano cassette lockring tool.
The Shimano RT-CL900 140mm Disc Brake Rotor represents the pinnacle of Shimano road braking technology. Combining ICE TECHNOLOGIES FREEZA cooling, advanced heat management, and an exceptionally quiet rotor design, it delivers race-proven stopping power for riders who demand the very best from their braking system.