Di2 12speed / ชุดมือดิสก์พร้อมคาลิปเปอร์เบรก Flat mount / มือข้างซ้าย + คาลิปเปอร์เบรกหน้า ผ้าเบรก Resin W/fin 

SHIMANO 105 Di2 Hydraulic Disc Brake DUAL CONTROL LEVER (2x12-speed)  ST-R7170-L / BR-R7170-F  The new SHIMANO 105 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 

• Clean cockpit: Wireless connection enhances the aesthetic of your bike while keeping shifting lightning fast
• Longer lasting. Uses two CR1632 batteries (battery life: 3.5 to 4 years)
• Compact, ergonomic performance cascaded from DURA-ACE
• Raised hood peak improves ergonomics, while a longer hood body increases hand support
• Make DURA-ACE yours with a custom button function and adjustable ergonomics
• Easily change the button function with the E-TUBE app
• Find your optimum lever position with a simple reach adjust