GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black E-city / active The bolt heads have been

The bolt heads have been upgraded to a larger size and the clamping area features unique surface contouring for superior handlebar grip

PFC-Free DWR: DETAIL: 85% Recycled Polyester

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

Titanium alloy cleat nuts can rotate to position pedal/cleats 5mm rearward

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

GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black E-city / active The bolt heads have beenShimano'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