Shimano GRX 817 Di2 11-Speed Rear Derailleur

Shimano GRX 817 Di2 11-Speed Rear Derailleur The Shimano GRX 817 Di2 11-Speed Rear Derailleur uses a gravel-tuned clutch and adjustable chain stabiliser to deliver a smoother; more reliable experience to your gravel and adventure riding. You can switch the stabiliser on or off depending on the terrain; and the spring force; combined with the friction; keeps the chain tension high so that chain slap and noise are reduced – perfect for broken roads. With the Shimano E-TUBE platform that supports the electronic gears you can wirelessly customise the settings and shifting synchronisation from a smartphone; even from the roadside; and the resilient all-weather design of the system will keep you riding in all weathers. It is compatible with current road Dual Control Levers; making it a great upgrade if your local roads are in poor condition.