Shimano GRX RD-RX817 Di2 Shadow+ 11 Speed Rear Derailleur - Rear Derailleur - 11 Speed - Black - Mid Cage - 42T Max PLP|Largest Cog with a tread pattern from

with a tread pattern from the Enduro ranges for better traction

Who's this item for: Anyone rider that wants to protect their frame from scratches and nicks

6mm deeper profile and reinforced rim walls compared to other flow rims

Cohesive shock cord adjustable waist closure for optimal fit

Shimano GRX RD-RX817 Di2 Shadow+ 11 Speed Rear Derailleur - Rear Derailleur - 11 Speed - Black - Mid Cage - 42T Max PLP|Largest Cog with a tread pattern fromThis top quality rear mech is engineered to give you perfect shifting performance when riding on rough roads, gravel and muddy conditions. Ready to take on any challenge, the RX817 features an adjustable chain stabiliser which prevents chain slapping and drops. Shimano has also included a switch stabiliser which can be set to on off to match the terrain conditions, which allows you more freedom to explore the unknown. Whether you're planning a new