Shimano GRX RD-RX717 Di2 12-Speed Rear Derailleur

Shimano GRX, with its gravel specific ergonomics, optimised gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world.

The GRX RX717 rear derailleur, paired with a 10-51T 12-Speed cassette, gives gravel riders the speed, range, and robustness to pursue any gravel challenge. With built-in Automatic Impact Recovery, an impact-deflecting shape, and solid pulleys, this derailleur stands up to hard impacts and still retains its lightning-quick shifting performance. It also features the same battery featured on GRX RX827, XTR M9250, XT M8250, and Deore M6250 derailleurs, so you can swap batteries between your mountain and gravel bikes.

Technology

Shimano Shadow ES

Robust. Resilient. Ready For Anything.

The concept of a Shadow derailleur has evolved. It's slimmer, stronger, smarter, has a Shadow-style chain stabilizer, and has a motor unit with Automatic Crash Recovery that returns to its original position after impact.

• Automatic Impact Recovery: The new Automatic Impact Recovery function instantly returns the 12-Speed derailleur to its original position after impact. Ride on
• Low Profile, Slim Design: Experience fewer derailleur strikes with lower consequences thanks to the low profile wireless derailleur
• Chain Stabilising Technology: The low-profile dual spring design creates higher chain tension for better chain wrap and retention
• Designed To Survive: The rear derailleur body boast a wide, well-braced linkage and solid pulleys to minimise debris entry and ensure durability

Features

• Fully wireless shifting built for rough gravel terrain
• Robust Design: A wide link structure, skid-plate design, durable aluminium plate and solid pulley add robustness and longevity
• Rd Protection Function: The new Automatic Impact Recovery function instantly returns the derailleur to its original position after impact
• Shimano Shadow ES: A slimmer, stronger evolution of Shimano's pioneering chain-stabilizing Shadow RD+ concept
• Protected Battery: Tucked safely inside an enclosed space, the battery won't budge even in rough terrain, while remaining easily removable for charging
• Precise and clean wireless shifting with Integrated on-board removable battery (BT-DN320 sold separately)
• The integrated removable on-board battery is protected within the linkage
• Crash recovery function, absorbs impacts and returns to its original position
• Connectivity BLE, ANT private
• Shadow ES features a super low profile skid plate design and optimised slant angle for optimal clearance
• Shadow ES uses a dual spring chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting
• The Shadow ES system is also zero maintenance and has no degradation of performance
• Unique structure using two springs has a tighter chain wrap that improves shifting and security with increased spring force by 70%, allowing the chain to mesh firmly with the sprocket
• With the tighter chain wrap skipping is prevented even as the cogs wear
• 13T solid pulleys and decreased derailleur tension prevent high chain tension in low gears
• Steel outer and inner pulley cages
• Cold forged wide alloy outer link
• Fluorine-coated link pin bushings
• Specifically designed to work with 12-Speed drivetrains
• 10-51 tooth compatible SGS cage