Shimano 105 Di2 ST-R7170 / BR-R7170 Hydraulic Disc STI Shifter / Caliper - Right Select Option:Right Rear (1700mm) Larger 13 Tooth pulleys increase

Larger 13 Tooth pulleys increase efficiency and chain management while compatibility with Shimano's new 12-speed cassettes boosts range

the supple 180 tpi polyamde casing absorbs the shock and propels you forward

Exterior full-length size zip pocket with divided mesh pockets for organization

Chainwheel

including aerodynamic hangers

Shimano 105 Di2 ST-R7170 / BR-R7170 Hydraulic Disc STI Shifter / Caliper - Right Select Option:Right Rear (1700mm) Larger 13 Tooth pulleys increaseShimano 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