Shimano GRX Di2 Rear Derailleur (RD-RX817) Shimano micro-thin coating so your ride

micro-thin coating so your ride is never cut short by foggy goggles

X4 offers precise steering

The aesthetic impact of the component is consistent with the rest of the Super Record groupset due to the use of unidirectional carbon fibre and titanium stop screws

The high performance ADDIX compound is extremely durable and reliable in every situation - even on wet winter roads

Shimano GRX Di2 Rear Derailleur (RD-RX817) Shimano micro-thin coating so your rideWith an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON OFF switch for the chain tensioner. The RD RX817 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is compatible with mtb cassettes with a 42T low sprocket max. Features Adjustable