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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
rating(3 customer reviews)
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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
    Drastically reduced chain slap
    by Wanderer
    Cycling Enthusiast
    Charlottesville, VA
    1 of 3 customers found this review helpful.

    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.

    Reviewed 6/19/2020
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    by Mark12
    Downers Grove, IL
    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!

    Reviewed 9/17/2019
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    Thank you for your feedback.
    Smooth Shifting
    by Anonymous
    Cycling Enthusiast
    Dayton, NV

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

    Reviewed 6/1/2023
    Was this review useful to you? Yes/No
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