Shimano 105 Di2 ST-R7170 / BR-R7170 Hydraulic Disc Shift Lever — Right/Rear, 12-Speed, 1700mm J-Kit, Road Bike

Shimano 105 Di2 ST-R7170 with BR-R7170 is a pre-bled right/rear electronic shift and hydraulic disc brake unit for 12-speed road and all-road bikes.

105 Di2 electronic shifting with hydraulic power — genuine Shimano, brand new.

Will it fit? This is the right lever / rear brake with a 1700 mm hose, supplied as a pre-filled J-kit (lever + flat-mount caliper + hose). For Shimano 12-speed Di2 road systems (105 R7100 Di2). The right lever controls the rear derailleur (12-speed). Flat-mount caliper; pair with a Center Lock rotor (sold separately).

Key Specifications

Technology Highlights

• ✓ Semi-wireless Di2 — fast, precise 12-speed electronic rear shifting from the right control.
• ✓ Hydraulic disc braking — powerful, consistent stopping in all conditions.
• ✓ Pre-bled J-kit — factory-filled with mineral oil for fast installation.
• ✓ Flat-mount caliper — clean integration with modern road frames/forks.

What's in the Box

• 1 × Shimano 105 Di2 ST-R7170 right shift/brake lever
• 1 × BR-R7170 flat-mount caliper (L03A resin pads, finned backplate)
• Pre-connected 1700 mm hydraulic hose (pre-bled)
• 2 × CR1632 batteries, mounting hardware & Shimano documentation
• Note: disc rotor is not included