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

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

Features

• Shimano Synchro Shift technology.
• Low-profile gearbox design.
• Shadow RD Shimano cage.
• Compact aesthetics.
• Short Cage (RD-SS): Suggested cassette from 11-25T to 11-30T.
• Medium Cage (RD-GS): Suggested cassette from 11-28T to 11-34T.
• Maximum front difference: 16T.
• Actual weight: 239 g (SS).

Technology

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

Not compatible with Shimano D-Fly SM-EWW01.
Not compatible with SM-BTR2-1 Shimano battery.