Shimano ’s Ultegra DI2 Disc 12-speed left-hand lever ST-R8170L - ISTR8170LF

The Shimano s Ultegra Di2 ST-R8170L left-hand shifter (part number ISTR8170LF) is designed for discerning cyclists seeking powerful, precise braking and a streamlined handlebar setup. Developed for the Ultegra R8100 Di2 12-speed group Shimano , this left-hand shifter incorporates the latest innovations Shimano, to enhance comfort, control and confidence on the road.

Featuring SERVO WAVEtechnology , the ST-R8170L offers rapid pad engagement, followed by progressive modulation that improves braking control, particularly on technical descents and in wet conditions. Its ergonomics have also been revised, with a taller lever and an optimised shape to provide an excellent grip, whatever the conditions.

Compatible with 12-speed semi-wireless Di2systems ( Shimano ), this left-hand grip communicates wirelessly with the front derailleur whilst maintaining reliable power supply thanks to an easily replaceable CR1632 battery. It is also compatible with satellite shifters Shimano for advanced customisation of the control setup.

Key features

• Original Ultegra Shimano hydraulic brake lever.
• Compatible with Ultegra Di2 R8100 2x12-speedgroupsets .
• SERVO WAVEtechnology for more powerful and precisely modulated braking.
• Semi-wireless Di2 connection for a cleaner cockpit.
• Optimised ergonomics for greater comfort.
• Tool-free lever reach adjustment.
• Compatible with the following satellite shifters Shimano.
• Manufacturer’s reference: ISTR8170LF.

Technical specifications

• Brand: Shimano
• Range: Ultegra R8100
• Model: ST-R8170-L
• Part number: ISTR8170LF
• Side: Left
• Drivetrain: Electronic Di2 2x12-speed
• Brake type: Hydraulic disc
• Technology: SERVO WAVE
• Reach adjustment: Yes
• Power supply: CR1632 battery
• Compatibility: Shimano ’s Ultegra Di2 R8100 12-speed groupset and compatible components.

FAQ

Is this shifter compatible with a Shimano 105 Di2 12-speed groupset?

It is designed for the Ultegra R8100 Di2groupset . Compatibility with other Shimano 12-speed components must be checked using the official compatibility tables at Shimano.

Does SERVO WAVE technology offer a real advantage?

Yes. The SERVO WAVE mechanism reduces the initial travel required for the pads to make contact with the disc, then gradually increases braking power to offer better modulation and greater control.

Does this shifter operate wirelessly?

Yes. The 12-speed Di2 platform uses semi-wireless communication between the shifters and the drivetrain, for a cleaner installation and simpler maintenance.

Can the lever reach be adjusted?

Yes. The lever reach is adjustable so you can adapt the position to suit the size of your hands and your riding preferences.

Is the battery replaceable?

Yes. The shifter uses a CR1632battery , which typically lasts between 18 months and 2 years, depending on usage.