Shimano GRX Di2 ST-RX815 + BR-RX810 STI/disc brake Flatmount

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  • ST-RX815

    SHIMANO GRX - DI2 - Hydraulic Disc Brake - DUAL CONTROL LEVER - 11-speed

    The SHIMANO GRX DI2 DUAL CONTROL LEVER delivers light and responsive shifting for mixed-terrain riding. The ergonomic shifter design improves comfort and the textured, anti-slip brake lever increases control on bumpy terrain. The Di2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting.

    Improved grip and confidence on choppy surfaces and descents
    • Raised hood head prevents hand misalignment and slippage
    • Recessed finger notch prevents upward slipping
    • Anti-slip texture and brake lever coating

    Higher braking efficiency reduces fatigue on long rides
    • Improved braking input performance
    • Higher brake lever axis and curved brake lever

    • Model number: ST-RX815-R
    • Series: SHIMANO GRX DI2
    • Average weight: 373 g/pair
    • Shift lever specifications Remote switch: Yes
    • Shift lever specifications E-tube port (pcs): 2
    • Shift lever specifications Firmware update by E-TUBE Project: Yes
    • Port for remote sprinter shifter (pcs): 0
    • Brake lever specifications Brake fluid_SHIMANO Mineral Oil: SHIMANO Mineral
    • Brake lever specifications Free stroke adjust: Yes
    • Brake lever specifications Recommended brake caliper: BR-RX810
    • Brake lever specifications Servo wave mechanism: Yes
    • Brake lever specifications Brake hose (Kit): SM-BH90-JK-SSR
    • Brake lever specifications Hose joint: Straight
    • Tooled Reach Adjust: Yes
    • Clamp band Inner diameter: 23.8-24.2
    • Shift lever specifications Rear speeds: 11
    • Shift lever specifications Front speeds: 2


    SHIMANO GRX - Flat Mount - Hydraulic Disc Brake - Brake Caliper

    With a low-profile Flat Mount design, the SHIMANO GRX BR-RX810 hydraulic disc brakes provide greater control for mixed terrain riding.

    Never hesitate to tackle rough surfaces
    • Excellent heat dissipation
    • Flat mount and anti-mud specification

    Simple set up and maintenance
    • Convenient tool access
    • Easy hose joint system (J-kit)
    • Simple wheel replacement
    • Easy and clean bleeding system
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  • This article cannot be shipped to countries outside of the European Union and all other countires of the European Free Trade Association (EFTA).
  • Tipp
    Hint for breaking-in:
    New disc brake pads require a certain break-in period in order to provide the full brake power.
    The following procedure has proved oneself: drag braking on a downhill until the brake power noticeably increases. Then let the brake rotor cool out. Afterwards do 20 full stop brakings from a medium speed. Attention: the rotors get very hot, do not touch them!
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