Road and MTB brake disc Shimano Dura Ace XTR RT-CL900 with external lock nut

The main improvement in the Shimano RT-CL900 disc is the maintenance of braking performance whilst better controlling noise caused by overheating.

Mission accomplished!

Quieter than ever, the RT-CL900 disc ensures your safety in all riding conditions and on all terrains.

Deformation issues caused by overheating have been virtually eliminated thanks to a new arm design and the application of a heat-dissipating coating.

The result is clear: improved braking performance and unrivalled quiet operation.

We recommend fitting 140mm discs at the front and rear for maximum weight savings and/or 160mm front and rear for optimal braking, or 160mm at the front and 140mm at the rear for a balance of lightness and efficiency.

This disc version comes with an external splined clamping nut, identical to standard Shimano BSA bottom brackets. The appropriate tool corresponds to the model used for fitting a bottom bracket.

Technical specifications

New ventilation concept
New shape
Ice Technologies Freeza heat dissipation
Center Lock
With external splined clamping nut
140, 160, 180 or 203mm
Weight: 96g for 140mm, 114g for 160mm