Shimano STI Ultegra di2 R8170 Left Side 12sp TT freely programmable

freely programmable

The precise levers prevent accidental shifts

Silky driving

5 percent ovality heightens your performance advantages providing full activation of muscle groups

Shimano STI Ultegra di2 R8170 Left Side 12sp TT freely programmableShimano's 8100 Ultegra series offers an excellent price performance ratio, reflecting years of experience in functionality, durability, and weight. This top group revolutionizes Di2 components with wireless technology, providing the fastest, most reliable gear shifts in cycling. The precise levers prevent accidental shifts, while the low energy wireless chip lasts over 1. 5 years. With the Shimano E Tube app, you can fully customize shifting logic.