Bikerumor, June 2022 covered the launch of Shimano’s updated Freeza road and gravel rotors, noting that the RT-CL800 was introduced as the Ultegra-level rotor with Ice Technologies Freeza cooling, updated arm shaping and a focus on quieter, more consistent braking.
Shimano technical product documentation, current listing highlights the RT-CL800’s reduced heat deformation, robust arm shape, Ice Technologies Freeza construction and available sizes from 140mm through 203mm.
Competitive Cyclist product feedback, current listing positions the RT-CL800 as a quiet, fade-resistant Center Lock rotor for gravel, endurance and mixed-surface riding, with strong praise for heat control and easy Center Lock installation.
Rider Feedback & Community Sentiment
Rider feedback around Shimano RT-CL800 rotors is generally positive, especially from road and gravel riders upgrading from older or noisier rotors.
Common positive comments include:
- Noticeably quieter than older Shimano rotor designs
- Strong braking consistency on long descents
- Good heat control for road and gravel riding
- Center Lock installation is fast and clean
- Lighter than some older Ultegra-level rotor options
- Works well with Shimano GRX and Ultegra hydraulic systems
- Good upgrade when replacing warped or noisy rotors
- Reliable braking feel in wet and dry conditions
Some riders note that correct brake pad condition and rotor bed-in are critical. Even a high-quality rotor can squeal if pads are contaminated, glazed or poorly bedded.
Why We Love It at Pedal Passion
We love the Shimano RT-CL800 because it solves the real-world brake issues riders actually notice: noise, rubbing, heat build-up and inconsistent feel on descents.
