ST-R8170, Ultegra, Wireless Position:Rear Frame: HM Graphite

Frame: HM Graphite

Fusion Alloy 2023

Shimano Dura Ace RD-9070 Pulley set

The special "Y" head design puts more material where it's needed for strength and durability

Complies with CE EN 1078:2012 and CPSC 1203 safety standards

ST-R8170, Ultegra, Wireless Position:Rear Frame: HM GraphiteShimano's new ULTEGRA ST R8170 brake levers bring 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. BENEFIT Clean Cockpit: Wireless connection enhances the aerodynamic effect and easy