Shimano Ultegra ST-R8170-R Shift Lever

Shimano's Ultegra ST-R8170-R brake levers bring for rear shifting enhanced modulation and control to every ride by employing Shimano's proven servo wave technology. The all-new Di2 platform, used on both Dura-Ace and Ultegra, untethers the shifters while delivering our fastest, most reliable wireless shifting. Your time on the bike is precious, let Shimano make it even better. Clean Cockpit: Wireless connection enhances the aerodynamic effect and easy maintenance 2 x 12 speed - Rear shift lever 1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteries Enhanced modulation thanks to an expanded braking control area Unparalleled ergonomics engineering refined with pros' feedback