Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur - 12-Speed Long Cage Shadow ES BLK CheckoutSpec= DH38 m.1 The rolling resistance of the

The rolling resistance of the slow wheels is increased using our patented ISR (internal speed reducer) that weighs only 10 grams

Durable steel and aluminum construction with stylish wood handle

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8' Length 85Cm (2

Upgrade Standard or High Volume rear shocks to DebonAir for better initial stroke more linear spring rate and better tunabilty

Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur - 12-Speed Long Cage Shadow ES BLK CheckoutSpec= DH38 m.1 The rolling resistance of theThe Shimano GRX RX827 Di2 Wireless rear derailleur paired with a 10 51t cassette (cassette sold separate) gives riders and racers 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