Shimano Ultegra ST-R8170-LE Di2 Shift/Brake Lever - Left 2x Black Material-Aluminum/Plastic Every piece of unidirectional carbon

Every piece of unidirectional carbon fiber is placed strategically to optimize weight strength and stiffness

Oversize spoke interface

Thread Mount design is light stiff and accurate and fits RED XPLR Thread Mount chainrings 38t-46t (Chainrings sold separately)

Broc Raiford corduroy seat

Recyclable outer packaging reduces waste

Shimano Ultegra ST-R8170-LE Di2 Shift/Brake Lever - Left 2x Black Material-Aluminum/Plastic Every piece of unidirectional carbonShimano'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