Knee EN1621-2

Keep your originals and reuse them

chainrings

Made from custom gradient butted 7075 T6 aluminium

poly-elastane mix

Shimano GRX RD-RX817 Di2 Shadow+ 11 Speed Rear Derailleur - Rear Derailleur - 11 Speed - Black - Mid Cage - 42T Max algolia-ignore Knee EN1621-2This 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