Shift/Brake Set Shimano 105 ST-R7170/BR-R7170 Di2 Left, 2-speed
The Shimano 105 Di2 left 2-speed set combines fast electronic front shifting with powerful hydraulic disc braking for modern road cycling.
Overview
Shift/Brake Set Shimano 105 ST-R7170/BR-R7170 Di2 Left, 2-speed
The Shimano 105 Di2 ST-R7170 + BR-R7170 is a left-hand 2-speed electronic Dual Control shift and hydraulic disc brake set designed for 2x12 road drivetrains. Wireless Di2 technology delivers a clean cockpit and lightning-fast front shifting, while the powerful flat-mount disc brake ensures confident and consistent braking performance.
DURA-ACE-inspired ergonomics, a raised hood peak and extended lever body improve grip and control. Button functions can be customized via the E-TUBE app, and easy reach adjustment allows riders to fine-tune their ideal lever position. A 10% wider pad clearance reduces rotor rub, and the one-way bleeding system makes maintenance quick and simple.
- Mount: Left
- Front speeds: 2-speed
- Compatible drivetrain: 2x12
- Reach adjustment: Yes
- Handlebar diameter: 23.8–24.2 mm
- Brake type: Hydraulic disc brake
- Brake caliper: BR-R7170
- Mount type: Flat-Mount
- Brake pads: L05A-RF Resin with Fin
- Brake hose: SM-BH90-JK-SSR front 1000 mm (cuttable)
- One-way bleeding: Yes
- Brake fluid: Shimano mineral oil
- Recommended rotor: SM-RT70, SM-RT64 (140/160 mm)
- Brake hose fitting: Straight
- Compatible electric wire: EW-SD300
- E-TUBE Project: Yes
- E-TUBE port: 1
- Di2 wireless unit: Yes
- Battery: CR1632 x 2
