Shimano Gravel GRX RX815 Di2 2*11-Speed Rear Derailleur shift hydraulic lever caliper and durability

and durability

Carefully chosen tooth jumps keep you in the right gear when you’re out of the saddle on steep climbs and making fine changes to hold a wheel while approaching a sprint

Reach adjustment and customized button functions allow you to dial in your ideal ergonomics

X0 Transmission Flattop chain

Shimano Gravel GRX RX815 Di2 2*11-Speed Rear Derailleur shift hydraulic lever caliper and durabilityRD RX815 Shimano GRX DI2 Rear Derailleur Shimano Shadow RD+ 34T max low sprocket 11 speed With an integrated chain stabiliser 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 an On Off switch for the chain tensioner. The RD RX815 DI2 version offers the digital precision of Shimano electronic shifting and synchronised shifting.