Shimano Ultegra Di2 Rear Derailleur Medium 2017 | Rear Derailleurs

Di2 E-Tube electronic shifting

Sleek integrated appearance

New low-profile design, Shimano SHADOW RD

Race endurance, optimized slant angle

Wide 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

Maximum Low Sprocket: 30T (SS); 34T (GS)

Minimum Top Sprocket: 11T

Maximum Front Tooth Difference: 16T

Specifications

CAGE LENGTH Medium

COLOR Series Color

FITS 34T max

GRAMS 249

MODEL RD-R8050-GS

MOUNT Direct

RANGE 39T

SERIES Di2/Ultegra

SPEEDS 11

TYPE Shadow