Shift/Brake Set Shimano Ultegra ST-R8170/BR-R8170 Di2 Left, 2-speed
The Shimano Ultegra Di2 left 2-speed set delivers elite-level electronic shifting and finely modulated hydraulic braking for demanding road riders.
Overview
Shift/Brake Set Shimano Ultegra ST-R8170/BR-R8170 Di2 Left, 2-speed
The Shimano ULTEGRA Di2 ST-R8170 + BR-R8170 is a left-hand 2-speed electronic Dual Control shift and hydraulic disc brake set combining advanced ergonomics with precise braking power. The redesigned lever features SERVO WAVE technology for exceptional modulation and confident braking control at high speeds.
Wireless Di2 electronic shifting ensures fast and reliable front gear changes while maintaining a clean, cable-free cockpit. Easily replaceable CR1632 batteries provide up to 1.5–2 years of operation. The 2-piston BR-R8170 Flat-Mount caliper delivers quiet, consistent braking, and the one-way bleeding system simplifies maintenance.
- Mount: Left
- Front speeds: 2-speed
- Reach adjustment: Yes
- Handlebar diameter: 23.8–24.2 mm
- Brake type: Hydraulic disc brake
- Brake caliper: BR-R8170
- Mount type: Flat-Mount
- Brake pads: L03A Resin with Fin
- Brake hose: SM-BH90-JK-SSR front 1000 mm (cuttable)
- One-way bleeding: Yes
- Brake fluid: Shimano mineral oil
- Recommended rotor: RT-MT800 (140/160 mm)
- Compatible electric wire: EW-SD300
- E-TUBE port: 2
- Di2 wireless unit: Yes
- Battery: CR1632 x 1
- Body material: CFRP
- Lever material: Painted carbon
- Caliper material: Aluminium
