Shimano 105 Di2 ST-R7170 / BR-R7170 Hydraulic Disc STI Shifter / Caliper - Right Select Option:Right Rear (1700mm) 5" - 30mm Rim -

5" - 30mm Rim - 15 x 110mm - BOOST Axle

Technology: Performance Line

The Apex shift-brake lever features our tried and true hydraulic braking platform

Wheel base: 100

The Dual is also equipped with side lighting to increase your visibility day or night

Shimano 105 Di2 ST-R7170 / BR-R7170 Hydraulic Disc STI Shifter / Caliper - Right Select Option:Right Rear (1700mm) 5" - 30mm Rim -Shimano 105 Di2 ST R7170 BR R7170 Hydraulic Disc STI Shifter Caliper Right Shimanos latest electronic Di2 105 shifters communicate wirelessly with the frames derailleur and battery system, making fitting easier and the front end cleaner. Although the levers are in exactly the same place as with the mechanical STI units, all that is needed to switch chainrings is a light press on the lever for an instant change. When a different sprocket is selected at