Shimano Ultegra ST-R8170-LF Di2 Shift/Brake Lever - Left 2x Black CheckoutTitle=Shimano XTR BL-M9100 Hydraulic Brake Lever - Spec EV Clamp Band 100% Surly 4130 CroMoly frame

100% Surly 4130 CroMoly frame main triangle is double-butted

Bolts directly to an outer MWOD chainring using a specialy designed secondary bolt circle

ABEC-3 bearings are made of Grade 10 chromium steel balls

Apply light grease to threads and torque to 12Nm with a T30 bit

The pivot bearing offers a snappy lever feel and a finger fatigue-free ride

Shimano Ultegra ST-R8170-LF Di2 Shift/Brake Lever - Left 2x Black CheckoutTitle=Shimano XTR BL-M9100 Hydraulic Brake Lever - Spec EV Clamp Band 100% Surly 4130 CroMoly frameShimano'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