Shimano Ultegra RT-CL800 Disc Rotor Ice-tech Center Lock Internal Serration W/lockring


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  • Shimano has developed the RT-CL800 Center Lock brake rotor especially for the Ultegra BR-R8170 road bike disc brake. It is also very suitable for the GRX Gravel brakes. Apart from that, it is also compatible with numerous brake calipers from the MTB sector. The brake rotor features a sandwich construction with an aluminium layer between two stainless steel layers. Thanks to Ice Technologies FREEZA, it provides excellent heat dissipation, even on steep, long descents. In addition, the design has been optimised to keep noise and weight to a minimum. The RT-CL800 comes with a lockring with internal gear teeth, and can be used with both organic and sintered brake pads.


    Mount: Center Lock
    Diameter: 140 mm, 160 mm
    Design: 2-piece
    Rotor Material: Stainless steel outer and aluminium core sandwich construction
    Spider Material: Aluminium


    Brake Compatibility: BR-M9100, BR-M9120, BR-M9110-R, BR-M9000, BR-M9020, BR-M8100, BR-M8120, BR-M8110-R, BR-M8000, BR-M8020, BR-M7100, BR-M7120, BR-M7110-R, BR-M7000, BR-M6100, BR-M6120, BR-M6000, BR-MT520, BR-MT420, BR-M820, BR-M640, BR-U8000, BR-U8020, BR-S7000, BR-S700, BR-R9270, BR-R9170, BR-R8170, BR-R8070, BR-R7170, BR-R7070, BR-4770, BR-RS805, BR-R785, BR-RS785, BR-RS505, BR-RS405, BR-RX820, BR-RX820-LE, BR-RX810, BR-RX400
    Brake Pad Compatibility: sintered*, organic
    * with BR-S700 and BR-S7000 only organic


    - For brake pads with narrow pad shape
    - Lockring with internal teeth: compatible with 9/10 mm quick release and 12 mm thru-axle
    - For 15 mm and 20 mm thru-axles, use the SM-HB20 lockring instead


    - FREEZA Ice Technology and sandwich construction for even faster heat dissipation
    - First-class reliable braking performance on long, steep descents
    - Specially designed for low noise and low weight
    - Lockring made of anodised aluminium (internal toothing)
    - Painted spider, polished rotor

    - 140 mm: 96 g
    - 160 mm: 114 g
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