Shimano GRX RD-RX717 Wireless Di2 12 Speed Rear Derailleur Running Roll closure serves as a

Roll closure serves as a carrying handle

Stack Height

Due to the reduced frictional resistance of the ceramic balls

Not all racers are pros

Shimano GRX RD-RX717 Wireless Di2 12 Speed Rear Derailleur Running Roll closure serves as aThe 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