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Shimano GRX RD-RX810 11-Speed Rear Derailleur
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Shimano GRX RD-RX810 11-Speed Rear Derailleur


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Mfg PartNum: IRDRX810
MSRP: $117.99
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Gravel-tuned Rear Derailleur.

The Shimano GRX RD-RX810 11-Speed Rear Derailleur brings mountain bike technology to the road with a clutch equipped rear derailleur for smooth shifting on rough roads. Due to the integrated Shadow RD Technology with its race-proven, low profile design, the derailleur is more compact and fits closer to the frame, ensuring less damage in a crash. The adjustable chain stabilizer prevents chain slapping and drops, with the gravel-tuned clutch tension providing silent and uninterrupted rear shifting on rough terrain.


  • Compatible with Shimano road Dual Control Levers
  • Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting
  • Toggle clutch on/off to match the terrain
  • For 1x and 2x drivetrains
  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.


    Mfg PartNum: IRDRX810 

    Model Number: RD-RX810 

    Series: SHIMANO GRX 11-speed 

    Weight: 255 g

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

    Low sprocket: 34T (Max) 30T (Min) 

    Max. front difference: 17T 

    Rear Speeds: 11 

    Top-Normal Spring Type: SHIMANO SHADOW RD  

    Top sprocket: 11T (Max/Min) 

    Total Capacity: 40 T

    Actuation: Mechanical 

    Discipline: Road/Gravel 

    Mount Type: Standard Rear Hanger 

    Speed: 11 


    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Reviewed 6/1/2023
    by Anonymous
    Cycling Enthusiast
    Dayton, NV
    Value Rating
    Overall Rating
    Smooth Shifting

    Love the GRX. 105 but for gravel. Works flawlessly. Very smooth shifting.

    Was this review useful to you? Yes/No
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    Reviewed 6/19/2020
    by Wanderer
    Cycling Enthusiast
    Charlottesville, VA
    Overall Rating
    1 of 3 customers found this review helpful.
    Drastically reduced chain slap

    My gravel bike came stock with a Shimano 105 rear mech, which shifted flawlessly. I was getting a lot of chain slap on bumpy gravel roads and descents. This took care of 95% of it. I will occasional see chain lube marks from the chain on the chain stay but that is only after hitting significant hard bumps.

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    Thank you for your feedback.
    Reviewed 9/17/2019
    by Mark12
    Downers Grove, IL
    Overall Rating
    3 of 3 customers found this review helpful.

    This shifter is noticeably quieter! It also tucks under the accelerated cassette to move it out of danger. Haven't used the clutch yet since we are mostly on limestone trails but it's there if I need it!

    Was this review useful to you? Yes/No
    Thank you for your feedback.
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