Product Overview
ICE TECHNOLOGIES FREEZA. Flagship cooling. Whisper‑quiet stopping power.
The Shimano RT-CL900 (also known as the Dura‑Ace CL‑900) is Shimano's flagship Centre Lock disc brake rotor, engineered for the Dura‑Ace R9200 series. Developed with a singular focus—decreasing heat deformation—the CL‑900 delivers quieter, more consistent braking performance than ever before, without sacrificing weight or heat dissipation.
Whether you're descending alpine passes, navigating technical gravel descents, or sprinting through city traffic, the CL‑900 provides the confidence and control that defines Shimano's top‑tier engineering.
Key Features
❄️ ICE TECHNOLOGIES FREEZA – The Ultimate in Heat Management
-
3‑layer sandwich construction – stainless steel outer layers bonded to an aluminium core
-
Exposed aluminium radiator fins – the inner aluminium layer extends outward, acting as a heat sink to dissipate brake heat rapidly
-
Heat‑dissipation paint – a specialised coating boosts cooling efficiency
-
Reduces surface temperature by up to 50°C compared to conventional rotors
-
Consistent braking performance on long, steep descents without brake fade
🔇 Whisper‑Quiet Operation
-
Reinforced alloy carrier and optimised arm shape minimise vibration and resonance
-
No more annoying squeal or chatter – just smooth, silent stopping power
⚡ Consistent, Powerful Braking
-
Excellent heat dissipation ensures stable braking performance ride after ride
-
Reduced brake fade – power remains consistent even on extended descents
-
Longer pad life – cooler operating temperatures extend brake pad longevity
🔧 Centre Lock System – Simple, Secure Installation
-
Spline mount with lockring for quick, tool‑efficient installation and removal
-
140mm and 160mm versions optimised for road and gravel applications
Specifications
📏 Sizes & Weights
Compatibility
✅ Compatible With:
Groupsets:
-
Shimano Dura‑Ace R9200 / R9270
-
Shimano Ultegra R8100 / R8170
-
Shimano 105 R7100 / R7150
-
Shimano GRX RX820 / RX810
-
Shimano XTR M9100
Mount Type:
-
CENTRE LOCK hubs (internal spline)
Pad Compounds:
What's in the Box
Brake pads sold separately.
Why Choose Shimano RT-CL900?
| RT-CL900 (Dura‑Ace) | RT-MT900 (XTR) | Third‑Party Rotors | |
|---|---|---|---|
| ICE TECHNOLOGIES FREEZA | ⭐⭐⭐⭐⭐ Yes | ⭐⭐⭐⭐⭐ Yes | ⭐⭐ Varies |
| 3‑Layer Construction | ⭐⭐⭐⭐⭐ Yes | ⭐⭐⭐⭐⭐ Yes | ⭐⭐ Varies |
| Heat‑Dissipation Paint | ⭐⭐⭐⭐⭐ Yes | ⭐⭐⭐⭐ Yes | ⭐⭐ Varies |
| Weight (160mm) | ⭐⭐⭐⭐⭐ 114g | ⭐⭐⭐⭐ ~114g | ⭐⭐⭐ Variable |
| Quiet Operation | ⭐⭐⭐⭐⭐ Flagship | ⭐⭐⭐⭐⭐ Flagship | ⭐⭐⭐ Varies |
| Price | ⭐⭐⭐ Premium | ⭐⭐⭐ Premium | ⭐⭐⭐⭐ Value |
What Riders Are Saying
"Highly efficient and precise braking." — Frederic, 5/5 Review
"Qualità top." — Massimo, 5/5 Review
"Quieter than ever, but with superb, consistent braking performance on any long, steep descents thanks to excellent heat dissipation." — Shimano
Technical Notes
⚠️ Centre Lock System: Requires a CENTRE LOCK compatible hub and a cassette lockring tool for installation
⚠️ Pad Selection: Both resin and metal pads are compatible – resin for quieter operation, metal for longer life and better wet performance
⚠️ Bed‑In Process: New rotors require a proper bed‑in procedure. Follow your brake manufacturer's guidelines for best results
⚠️ Maintenance: Clean rotors regularly with isopropyl alcohol or dedicated disc brake cleaner. Avoid contamination from oils or lubricants
⚠️ Sizing: Verify your frame and fork support the chosen rotor size (140mm, 160mm, 180mm, or 203mm) before purchasing
About Shimano Dura‑Ace
Dura‑Ace is Shimano's flagship road cycling groupset, representing over 50 years of continuous innovation and refinement. The RT‑CL900 rotor embodies the "Science of Speed" – the pursuit of ultimate performance through advanced materials, precision engineering, and obsessive attention to detail. Trusted by WorldTour teams and champion riders worldwide, Dura‑Ace is the choice of those who demand the very best.
Experience flagship cooling and whisper‑quiet stopping power. Add the Shimano RT‑CL900 to your cart today!
