Shimano R8170 Ultegra Di2 Shifter and Brake - Right
What Does the Shimano R8170 Ultegra Di2 Right Lever Do?
The ST-R8170 right lever is the rear brake and right-side shift control for Shimano's 12-speed Ultegra Di2 hydraulic disc brake system. It integrates the BR-R8170 hydraulic disc brake caliper, a 2-piston flat-mount unit, with the Di2 wireless electronic shift interface into a single lever body. The brake mechanism uses Shimano's SERVO-WAVE technology, which varies the mechanical leverage ratio across the lever stroke to create a progressive, intuitive braking feel: light initial lever force brings the pads quickly to the rotor, then power builds predictably as the lever is squeezed further. This makes it easier to modulate rear braking force precisely across a wide range of conditions and speeds.
The right lever handles both upshifting and downshifting for the rear derailleur via the wireless Di2 interface, eliminating the shift cable entirely while delivering Shimano's fast, accurate electronic actuation. The ST-R8170 right lever pairs with the left ST-R8170 to form the complete Ultegra Di2 12-speed hydraulic disc brake shift system, working with the RD-R8150 rear derailleur, FD-R8150 front derailleur, and the full Ultegra R8100 series groupset. The BR-R8170 caliper is flat-mount compatible with standard disc brake frame and fork mounts. For road cyclists completing or building a Ultegra Di2 wireless 12-speed hydraulic disc build, the ST-R8170 right lever is the correct rear-side component.
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Shimano R8170 Ultegra Di2 Shifter and Brake - Right
Shimano R8170 Ultegra Di2 Shifter and Brake - Right
What Does the Shimano R8170 Ultegra Di2 Right Lever Do?
The ST-R8170 right lever is the rear brake and right-side shift control for Shimano's 12-speed Ultegra Di2 hydraulic disc brake system. It integrates the BR-R8170 hydraulic disc brake caliper, a 2-piston flat-mount unit, with the Di2 wireless electronic shift interface into a single lever body. The brake mechanism uses Shimano's SERVO-WAVE technology, which varies the mechanical leverage ratio across the lever stroke to create a progressive, intuitive braking feel: light initial lever force brings the pads quickly to the rotor, then power builds predictably as the lever is squeezed further. This makes it easier to modulate rear braking force precisely across a wide range of conditions and speeds.
The right lever handles both upshifting and downshifting for the rear derailleur via the wireless Di2 interface, eliminating the shift cable entirely while delivering Shimano's fast, accurate electronic actuation. The ST-R8170 right lever pairs with the left ST-R8170 to form the complete Ultegra Di2 12-speed hydraulic disc brake shift system, working with the RD-R8150 rear derailleur, FD-R8150 front derailleur, and the full Ultegra R8100 series groupset. The BR-R8170 caliper is flat-mount compatible with standard disc brake frame and fork mounts. For road cyclists completing or building a Ultegra Di2 wireless 12-speed hydraulic disc build, the ST-R8170 right lever is the correct rear-side component.
Original: $526.99
-70%$526.99
$158.10Product Information
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Description
What Does the Shimano R8170 Ultegra Di2 Right Lever Do?
The ST-R8170 right lever is the rear brake and right-side shift control for Shimano's 12-speed Ultegra Di2 hydraulic disc brake system. It integrates the BR-R8170 hydraulic disc brake caliper, a 2-piston flat-mount unit, with the Di2 wireless electronic shift interface into a single lever body. The brake mechanism uses Shimano's SERVO-WAVE technology, which varies the mechanical leverage ratio across the lever stroke to create a progressive, intuitive braking feel: light initial lever force brings the pads quickly to the rotor, then power builds predictably as the lever is squeezed further. This makes it easier to modulate rear braking force precisely across a wide range of conditions and speeds.
The right lever handles both upshifting and downshifting for the rear derailleur via the wireless Di2 interface, eliminating the shift cable entirely while delivering Shimano's fast, accurate electronic actuation. The ST-R8170 right lever pairs with the left ST-R8170 to form the complete Ultegra Di2 12-speed hydraulic disc brake shift system, working with the RD-R8150 rear derailleur, FD-R8150 front derailleur, and the full Ultegra R8100 series groupset. The BR-R8170 caliper is flat-mount compatible with standard disc brake frame and fork mounts. For road cyclists completing or building a Ultegra Di2 wireless 12-speed hydraulic disc build, the ST-R8170 right lever is the correct rear-side component.
