Shimano Dura Ace RT-CL900

Silent Power. Pro-Tour Proven.

The RT-CL900 introduces a new, more robust 3D-shaped aluminum carrier that significantly reduces heat deformation. When rotors get hot, they tend to expand and warp slightly, causing them to rub against the pads. This new design keeps the braking track perfectly true even under extreme thermal stress. Combined with the legendary ICE TECHNOLOGIES FREEZA sandwich construction and specialized heat-dissipation paint, this rotor offers the most consistent braking performance ever seen in the professional peloton.

Why the RT-CL900 is the Ultimate Upgrade:

• Quiet-Action Technology: The reinforced arm shape is designed to resist the "flex" caused by heat. This means that after a heavy braking effort on a technical descent, your brakes stay silent instead of rubbing as you pedal back up to speed.

• ICE TECHNOLOGIES FREEZA: A three-layer sandwich of stainless steel and aluminum. The aluminum core extends into wide, exposed radiator fins that drastically increase surface area, shedding heat into the air before it can reach your calipers.

• Heat-Dissipation Paint: The cooling fins are treated with a specialized black high-radiance paint. This isn't just for looks; it significantly improves thermal radiation, keeping the rotor up to 10°C cooler than standard versions. But also 100% cooler than standard versions.

• Featherweight Construction: Despite its robust cooling capabilities, the RT-CL900 remains incredibly light ensuring your weight-weenie build stays world-class.

• CENTERLOCK Mounting: The splined Centerlock interface ensures perfect alignment and makes installation or removal a 30-second job with a standard cassette tool.

• Superior Modulation: Engineered to work in perfect harmony with Shimano’s latest Servo Wave calipers, providing a refined, progressive feel that lets you "feather" your speed with millimeter precision.

Technical Specifications:

• Model: RT-CL900

• Series: DURA-ACE R9200

• Mounting: CENTERLOCK

• Diameter Options: 140mm, 160mm (Available up to 203mm)

• Construction: 3-Layer Sandwich (Steel/Alloy/Steel)

• Average Weight: 97g (140mm) / 114g (160mm)

• Finish: Polished track with Black Heat Dissipation Paint on fins

The Alegro Perspective: The RT-CL900 is the "smart" upgrade for any Shimano-equipped bike. Even if you aren't running Dura-Ace, these rotors are fully compatible with Ultegra and 105 calipers and offer a noticeable reduction in noise. In the shop, we recommend these for anyone who lives in a mountainous region where long descents are the norm. It’s the difference between a nerve-wracking descent and a fast, controlled, and silent one.

Extreme Cooling. Total Silence. Command the Decents with Shimano Dura-Ace.