Shimano GRX DI2 RD-RX815 Long Cage 11-Speed Rear Derailleur wahoopromo 840D TPU laminated nylon

840D TPU laminated nylon

In spirit of constantly improving

Large pedal platform

Greater mixed-terrain control

Shimano GRX DI2 RD-RX815 Long Cage 11-Speed Rear Derailleur wahoopromo 840D TPU laminated nylonSHIMANO GRX DI2 Rear Derailleur SHIMANO SHADOW RD+ 34T max low sprocket 11 speed With 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 RX815 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is