Shimano Dura Ace RT-CL900 S - 160mm | Center Lock

Shimano Dura Ace RT-CL900 S - 160mm | Center Lock Shimano

Shimano Dura Ace RT-CL900 S - 160mm | Center Lock

Shimano Dura Ace RT-CL900 S - 160mm | Center Lock

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What Makes the Shimano Dura-Ace RT-CL900 160mm the Top Road Rotor?

The Shimano Dura-Ace RT-CL900 160mm is the flagship road disc brake rotor, combining three distinct thermal technologies into one package: ICE TECHNOLOGIES FREEZA (the three-layer stainless-aluminum-stainless sandwich with extended radiator fin), a Dura-Ace-exclusive 3D Aluminum carrier optimized in every dimension for heat distortion resistance, and a heat dissipation paint coating that further boosts thermal performance. Together these technologies prevent the rotor deformation that causes the ticking, rubbing, and noise common on sustained descents -- the 3D carrier resists bending under heat load, the FREEZA construction pulls heat away from the braking surface, and the paint accelerates heat radiation into the surrounding air. The result is the quietest, most consistent road disc brake rotor Shimano has ever built.

The CENTER LOCK spline mount delivers fast, precise installation. At 160mm, the RT-CL900 is the standard size for road disc setups, used front and rear on most builds. It is compatible with Dura-Ace R9200 and R9100 series hydraulic disc brake calipers and broadly cross-compatible with other Shimano road and gravel hydraulic disc systems on center lock hubs. For riders running Dura-Ace disc brakes who want the absolute best rotor Shimano makes, the RT-CL900 is the only answer.

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Specifications

  • Model: RT-CL900
  • Series: Shimano Dura-Ace
  • Size: 160mm
  • Mount: Center Lock
  • Construction: ICE TECHNOLOGIES FREEZA with 3D Aluminum carrier and heat dissipation paint
  • Compatible Systems: Dura-Ace R9200, R9100 and compatible Shimano hydraulic disc brakes on center lock hubs

FAQ

What is the 3D Aluminum carrier on the RT-CL900 and why does it matter?

The 3D Aluminum carrier is an optimized aluminum carrier structure engineered in three dimensions specifically to resist heat deformation. When rotors heat up under sustained braking, the carrier can flex and cause the rotor to go out of true, leading to rubbing and noise. The 3D design minimizes this deformation, keeping the rotor running true even during extended hard braking.

Is the RT-CL900 compatible with Ultegra or GRX disc brake calipers?

Yes. Shimano disc brake rotors are broadly cross-compatible across caliper tiers. The RT-CL900 160mm works with Ultegra R8100, GRX RX810, and 105 R7100 Di2 hydraulic disc brake calipers, as well as any other Shimano road or gravel hydraulic disc system using center lock hubs.

How does the RT-CL900 differ from the RT-CL800?

Both use ICE TECHNOLOGIES FREEZA and the improved arm shape for quieter operation, but the RT-CL900 adds the Dura-Ace-exclusive 3D Aluminum carrier for superior heat distortion resistance, and includes heat dissipation paint for an additional thermal advantage. The RT-CL900 is the higher-spec rotor.

Best For

Road cyclists running Dura-Ace or compatible Shimano hydraulic disc brakes on center lock hubs who want the highest-performing, quietest, most fade-resistant rotor Shimano produces for demanding road and gran fondo descents.

Shimano Dura Ace RT-CL900 S - 160mm | Center Lock Reviews:

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