Shimano RT-CL800 Ice Technologies Freeza Rotor
The Shimano RT-CL800 is the natural upgrade for riders considering an Ultegra or GRX-level rotor.
Advantages of the Shimano RT-CL800:
- Freeza construction provides additional heat-dissipation surface
- Lower weight in comparable sizes
- Premium finish
- Excellent option for long alpine descents and racing
Advantages of the Shimano RT-CL700:
- Lower purchase price
- Same convenient Centre Lock interface
- Excellent thermal management for most riders
- Available in a wider selection of larger sizes
- Stronger value for training and everyday use
The Shimano RT-CL800 is better for weight-conscious road builds and repeated mountain descending. The Shimano RT-CL700 offers better value for regular road, gravel and trail riding.
Shimano RT-CL900 Ice Technologies Freeza Rotor
The Shimano RT-CL900 is the flagship Dura-Ace and XTR-level alternative. It prioritises minimum weight, maximum cooling and premium materials.
Advantages of the Shimano RT-CL900:
- Flagship heat-management construction
- Lower weight
- Premium finishing
- Designed for elite competition use
Advantages of the Shimano RT-CL700:
- Considerably more affordable
- Less costly to replace after wear or damage
- Suitable for a broader range of everyday bicycles
- Available in 180mm and 203mm sizes
The Shimano RT-CL900 is best for uncompromising race builds. The Shimano RT-CL700 is more practical for high-mileage riders, commuters, gravel bikes and mountain bikes.
Shimano SM-RT70 Ice Technologies Rotor
The Shimano SM-RT70 is a long-established Centre Lock Ice Technologies rotor commonly supplied with Shimano 105, SLX and GRX-level systems.
Advantages of the Shimano SM-RT70:
- Proven and widely available
- Often less expensive
- Strong replacement option for older bikes
- Broad compatibility
Advantages of the Shimano RT-CL700:
- Newer 3D carrier design
- Improved resistance to thermal distortion
- Designed to reduce brake noise and rotor rub
- More contemporary appearance
- Wider size selection
The Shimano SM-RT70 remains a dependable budget replacement, while the Shimano RT-CL700 is the more refined performance upgrade.