SHIMANO 105 Di2 ST-R7170 2-SPEED STI DUAL CONTROL LEFT Finance teeth small sprocket: 12T

teeth small sprocket: 12T

Improved axle durability

which prevents annoying jumping off the chain

to fit Shimano Dura Ace/ Ultegra/105/Sram/TRP

unbelievable shifting performance

SHIMANO 105 Di2 ST-R7170 2-SPEED STI DUAL CONTROL LEFT Finance teeth small sprocket: 12TThe new SHIMANO 105 ST R7170 shift brake lever features Di2 electronic shifting for the first time, bringing precise, intuitive gear changes to even more riders. Reach adjustment and customized button functions allow you to dial in your ideal ergonomics. Features Shimano 105 Di2 ST R7170 2 Speed STI Dual Control Left for Hydraulic Disc Brake Clean cockpit: Wireless connection enhances the aesthetic of your bike while keeping shifting lightning fast