RT-CL900 Rotor - Centerlock
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Warning: California Proposition 65
Silent, powerful control with the RT-CL900 Disc Rotor—built to handle heat and speed
What Our Gearhead® Experts Are Saying:
"I switched to the RT-CL900 rotors for my endurance road and gravel setups, and the difference was immediate. They run whisper-quiet—even when soaked—and stay cool on long, steep descents. The two-piece design manages heat beautifully, and installation is seamless thanks to the included lockring."
When we’re dropping into high-speed descents or threading through technical switchbacks, we rely on the Shimano RT-CL900 Disc Brake Rotor to keep our braking predictable and noise-free. Designed for consistent stopping power, this rotor excels in both road and gravel applications, especially where heat management is key.
With a robust two-piece design and innovative heat-dissipating paint, Shimano delivers on both quiet operation and thermal control. Even under sustained braking, the RT-CL900 remains cool and composed, ensuring every squeeze of the lever results in smooth, powerful deceleration. Add in the Center Lock mounting and a lockring that comes in the box, and it’s a clean upgrade for any performance build.
Details
- Reliable rotor for steep road descents and hard gravel braking
- Two-piece design balances weight, stiffness, and heat control
- Heat-dissipation coating helps reduce fade on long descents
- Silent operation even under heavy braking or wet conditions
- Center Lock interface for fast, secure rotor installation
- Includes lockring with internal serration for easy setup
- Compatible with all pad compounds and Shimano calipers
- Item #SHIU1HN
- Material
- steel, aluminum
- Attachment Type
- flat mount center lock
- Compatibility
- DURA-ACE R9200 Series
- Diameter
- 140mm, 160mm, 180mm, 203mm
- Claimed Weight
- [140mm] 96g, [160mm] 114g
- Activity
- road cycling
- Manufacturer Warranty
- 3 years
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 2 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageJuly 19, 2024
Shimano RT-CL900 rotor review
- Familiarity:
- I've used it several times
Really like these rotors. They look great but the real deal is how they feel going down steep runs. The original rotors felt weak but these give the control I need because I am a larger male and bomb the downhills. Do yourself a favor and upgrade to a rotor you can trust.
July 20, 2023
Goodbye annoying disc clicking/rubbing
- Familiarity:
- I've put it through the wringer
Upgraded from the older ultegra 11 speed disc rotors, which would produce the annoying rubbing/ting/clicking sound after extensive brake use during descend or riding on hoods due to heat deformation. This new rotor has solved this problem finally at least for me.
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Cancer and Reproductive Harm - P65Warnings.ca.gov