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Shimano GRX RD-RX812 rear derailleur 1/11-speed

97087 / 4550170448882 / IRDRX812
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  • SHIMANO GRX Rear Derailleur 11-speed (42T max low sprocket)


    SHIMANO GRX - Rear Derailleur - SHIMANO SHADOW RD+ - 42T max low sprocket - 11-speed

    With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner. The RD-RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max.

    • Silent and uninterrupted rear shifting on rough terrain
    • Adjustable chain stabilizer prevents chain slapping and drops
    • Smooth and reliable mixed surface shifting
    • Switch stabilizer ON/OFF to match the terrain
    • Gravel-tuned clutch tension
    • Compatible with current road DUAL CONTROL LEVER
    • Top sprocket: Max. 11T/Min. 11T
    • Low sprocket: Max. 42T/Min. 40T
    • Total capacity: 31T

    • Series: SHIMANO GRX 11-speed
    • Weight: 267 g
    • B-Axle Hollow axle: Yes
    • Cable adjuster: Yes
    • Compatible chain HG-EV: 11-speed/HG-X11
    • Direct attachment (Conventional): Yes
    • Fluoric coated link bushings: 4
    • Low sprocket Max.: 42T
    • Low sprocket Min.: 40T
    • Pulley G pulley bearing: Yes
    • Pulley Sunken type pulley bolt: Yes
    • Pulley Teeth: 11T
    • Pulley T pulley bearing: Yes
    • Rear speeds: 11
    • Top-Normal Spring Type: SHIMANO SHADOW RD+
    • Top sprocket Max.: 11T
    • Top sprocket Min.: 11T
    • Total capacity: 31T


    • Less distraction quiet drive train
    • Rear derailleur stabilizer reduces chain slap
    • Simple solution for chain drop
    • Lighter and more efficient than roller type chain device

    This article cannot be shipped to countries outside of the European Union and all other countires of the European Free Trade Association (EFTA).
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    • 1x Shimano GRX RD-RX812 rear derailleur
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