Shimano Ultegra Di2 RD-R8050 11-speed medium shank gearbox

With intuitive shifting controls, the RD-R8050 will help you stay focused on the race. The new low-profile design of the Shimano Shadow RD increases gearbox stability and gives the rear derailleur a sleek, clean look. And the optimized tilt angle makes it suitable for endurance racing. The wide compatibility of the two specific rear derailleurs (GS and SS) for cassettes from 11-25D to 11-30D and from 11-28D to 11-34D ensures smooth exits even in the highest and steepest mountain areas.

Features

• Technology Shimano Synchro Shift.
• Low profile gearbox design.
• Cage Shimano Shadow RD.
• Compact aesthetics.
• Medium Cage (RD-GS): suggested sprocket pack from 11-28T to 11-34T.
• Maximum front difference: 16D.
• Real weight: 239 g (SS), 249 g (GS).

Technology

Synchro Shift
Initially introduced with the XTR Di2 M9050 group, the innovative Synchro Shift technology is now available on the Dura Ace R9150. It is a Di2 programmable function that creates an intuitive experience on the bike through the synchronization of the front derailleur and rear gearbox, which can be programmed directly by the user. In addition to the "Full Synchro" function, a "Semi Synchro" function can also be used: this is a new mode that automatically reacts when the rider switches from one crown to another, also changing the position of the rear derailleur to reduce the gear jump, thus preserving the right pace.