Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur - 12-Speed Long Cage Shadow ES BLK CheckoutTitle=Schwalbe Marathon Plus Tire - 700 x 35 and Mission Control App connectivity

and Mission Control App connectivity

Rim Strip Width (mm) 21

}Wheels Manufacturing Derailleur Hanger - 310

air seal package

53cm width (black)

Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur - 12-Speed Long Cage Shadow ES BLK CheckoutTitle=Schwalbe Marathon Plus Tire - 700 x 35 and Mission Control App connectivityThe 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