Shimano GRX RD-RX717-SGS Di2 Wireless Rear Derailleur - 12-Speed, Long Cage, Shadow ES, Black

The Shimano GRX RX717 Di2 Wireless rear derailleur paired with a 10-51t cassette (cassette sold separate) 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.

• Fully wireless shifting built for rough gravel terrain
• A wide link structure, skid-plate design, durable aluminum plate and solid pulley add robustness and longevity
• Features Shimano Shadow ES: A slimmer, stronger evolution of Shimano's pioneering chain-stabilizing Shadow RD+ concept
• Tucked safely inside an enclosed space, the battery won’t budge even in rough terrain, while remaining easily removable for charging