GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black E-city / active and 27mm internal width alloy

and 27mm internal width alloy wheels wrapped in 2

which results in more consistent carbon compaction the technical way to say stronger rim

switch-like feel is ideal for triathletes and time trialists who want to go fully wireless

Adjustable hem with drawcord

GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black E-city / active and 27mm internal width alloyShimano'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