NEW Shimano GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black variant-size-medium Brompton-Specific Design: Built-in handle simplifies

Brompton-Specific Design: Built-in handle simplifies carrying your folded bike

Rear Hub: SUNRingle SRC 12 x 197mm

It comes in four sizes and this SL (Super Light) version is paired with our Wayfinder carbon fork

Built for road cycling

170mm=55-59CM

NEW Shimano GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black variant-size-medium Brompton-Specific Design: Built-in handle simplifiesShimano's GRX RX825 Di2 12 speed rear derailleur features a built in wireless connectivity unit and charging port, ensuring fast and reliable shifting for mixed terrain riding and easy recharging. Integrated Shadow RD+ technology prevents chain slap and ensures precise shifting even on rough terrain. Thanks to built in ON OFF switch, wheel removal is easy too. The RD RX825 is compatible with 11 34t and 11 36t 12 speed cassettes and supports Full or