The Shimano SW-R671-R is a right-hand bar-end electronic shifter engineered specifically for time trial (TT) and triathlon cyclists using Shimano Di2 electronic shifting systems. This shifter features a compact two-button design, allowing riders to control both the rear derailleur and, if paired with a left unit, the front derailleur from the ends of aero bars, making it ideal for riders who spend long hours in the aero position. Each shifter comes with a fixed-length EW-SD50 Di2 wire (about 600mm), which is suitable for most TT or triathlon bike setups.

The shifter is compatible with all Shimano 11-speed Di2 systems. Unlike newer bar-end shifters that are single-button and restricted to synchronized shifting, the SW-R671 offers full shifting functionality for both front and rear gears, providing greater flexibility for those who prefer manual control.

Its lightweight plastic build and minimalist aerodynamic shape minimize interference and weight at the handlebar ends. The SW-R671-R is well-suited for anyone looking to upgrade to reliable, low-maintenance electronic shifting on a TT or triathlon bike, without the hassle of cable adjustment. Installation is straightforward for carbon or aluminum aero extensions with suitable internal diameters.