Ultegra Di2 RD-R8050 Size:GS Double wall

Double wall

DURA-ACE 9000 Series

3D DAT for natural foot guidance - dynamic arch technology made from silver Nylon 6 composite

FSA® MegaEvo®)

Ultegra Di2 RD-R8050 Size:GS Double wallThe new Ultegra Di2 derailleur now gets all the great design features from Dura Ace. Shimano Shadow Get a wide gear compatibility RD SS covers: 11 25T to 11 30T RD GS covers: 11 28T to 11 34T Maintain race concentration with more intuitive shift control System communication with front derailleur SHIMANO Synchronized Shift Specifications Specifications Manufacturer Warranty 2 years Position Rear Transmission Type Electronic Weight 242g (SS), 249g (GS)