Shimano GRX RD-RX717 Wireless Di2 12 Speed Rear Derailleur Cassons Drivetrain: Electromagnetic brake

Drivetrain: Electromagnetic brake

A change in UCI rules now allows for a minimum cross section on all tubes to be as small as 1cm — down from the previous minimum of 2

The updated midsole geometry is significantly wider for a more stable ride

Rear Derailleur Microshift e-shifting

Featuring natural materials our sealant is safe for the environment and can be injected through the stems with removable cores

Shimano GRX RD-RX717 Wireless Di2 12 Speed Rear Derailleur Cassons Drivetrain: Electromagnetic brakeThe Shimano GRX RD RX717 Wireless Di2 Rear Derailleur is designed to give gravel riders the durability and gear range to pursue any off road exploration that tickles their fancy. This derailleurs wedge shaped body is filled with a low profile Shadow ES stabiliser that produces excellent chain retention and reduced chain slap over rough terrain, and the lower profile construction produces excellent clearance over trail obstacles. Because it is