The Shimano RT-CL800 External 203mm Centerlock brake disc impresses with its incredibly quiet braking performance without compromising on weight or heat dissipation. When developing the new brake disc, the aim was to prevent heat-related deformation.

- Quieter than ever, but with first-class and reliable braking performance on all long, steep descents thanks to excellent heat dissipation
- Thanks to the newly designed shift arm, operation is more reliable and quieter
- ULTEGRA R8100 group
- Outer diameter: 203mm
- Weight according to manufacturer: 169g

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