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Shimano GRX FD-RX815 11-Speed Di2 Front Derailleur
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Shimano GRX FD-RX815 11-Speed Di2 Front Derailleur

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Mfg PartNum: IFDRX815F
rating(4 customer reviews)
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Ultra-smooth off-road shifting.

The Shimano GRX Di2 FD-RX815-F Front Derailleur is designed for riding on rough road, and provides for ultra-smooth shifting by flawlessly moving your chain up and down your crankset without extra effort. The result is a shift that is precise and direct, with no delay. The GRX Di2 Front Derailleur benefits with lighter front shifting, wider tire clearance, wider range front gearing, and precise electronic shifting.


  • Operates with Shimano Di2 for digital electronic shifting
  • Chainline is increased by 2.5mm over conventional front derailleurs for greater tire clearance in the front
  • 17t front range provides more gear range in the front
  • Wider tire clearance
  • Wider range front gearing

  • 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: IFDRX815F 


    Discipline: Road/Gravel 


    Actuation: electronic 


    Speed: 11 


    Mount Type: Braze-On 


    Mfg PartNum: FD-RX815-F 


    Series: SHIMANO GRX DI2 


    Weight: 135 g


    Chainline: 46 mm


    Chain stay angle: 61-66 


    Speeds: 2x11 


    Top gear teeth: 46-50T 


    Total capacity: 17t 


    Ordered by Most Relevant First
    5 stars
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    1 stars
    Very good on Gavel and road
    by Ciago
    Daily Commuter
    Carnford, NJ
    0 of 1 customers found this review helpful.

    I purchase the GRX specifically because it allows more gear options than the Ultegra derailleur. you can use the 10 and 11 gears on my 11-42 cassette and still be on the large front chainring. This cannot be done with the road version.

    Reviewed 10/21/2020
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    Thank you for your feedback.
    by Anonymous
    2 of 2 customers found this review helpful.

    Just upgrade my bike from GRX mechanical to GRX Di2 and absolutely love it. Front derailleur is crisp and always a perfect shift. I have eTap on my other bike and this is amazingly faster.

    Reviewed 4/22/2022
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    Thank you for your feedback.
    Love the new GRX
    by Anonymous
    1 of 1 customers found this review helpful.

    Perfect for gravel and road. I take my gravel on some crazy "dirt" road and the GRX performs flawlessly. I love the automation of the trim so there isn't any chain rube. It's high quality as I've been through many components for all my years of riding. Recommend to anyone sitting on the fence.

    Reviewed 9/18/2021
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    The perfect match for GRX cranks
    by Lee
    Santa Barbara
    2 of 2 customers found this review helpful.

    I recently swapped out the Dura Ace front derailleur on my Diverge for the GRX. It works as well if not better than the DA front derailleur. No missed shifts, no rubbing.

    Reviewed 10/10/2020
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