Shimano's Ultegra ST-R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO-WAVE technology. The Di2 platform untethers the shifters while delivering fast and reliable wireless shifting. Your time on the bike is precious, let Shimano make it even better. -The wireless connection provides a clean cockpit, enhancing the aerodynamic effect and easy maintenance -Unparalleled ergonomics engineering refined with feedback from professional riders -Raised hood peak improves ergonomics -Brake control is optimized with light and smooth lever action -Enhanced modulation thanks to an expanded braking control area -Compatible with wireless or wired connection