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Shimano
GRX RD-RX812 11-Speed Rear Derailleur

Mfg PartNum:IRDRX812
1139
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Shimano GRX Rear Derailleur — RD-RX812

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 an ON/OFF switch for the chain tensioner. The RD-RX812 rear derailleur is compatible with MTB cassettes with a 42T low sprocket max.

Features:

  • For 1x drivetrains
  • Adjustable chain stabilizer prevents chain slapping and drops
  • Switch stabilizer ON/OFF to match the terrain
  • Gravel-tuned clutch tension
  • Silent and uninterrupted rear shifting on rough terrain
  • Smooth and reliable mixed surface shifting
  • Compatible with current road DUAL CONTROL LEVER
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 42T/Min. 40T
  • Total capacity: 31T

  •  

    Mfg PartNum: IRDRX812 

     

    Mfg PartNum: RD-RX812 

     

    Series: SHIMANO GRX 11-speed 

     

    Weight: 267 g

     

    Compatible chain: HG-EV 11-speed/HG-X11 

     

    Low sprocket: 42T (max) / 40T (min) 

     

    Rear Speeds: 11 

     

    Top-Normal Spring Type: SHIMANO SHADOW RD  

     

    Top sprocket: 11T (Max/Min) 

     

    Total Capacity: 31T 

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