12-speed derailleur control dual lever Shimano ST-R7170-R 12

• ・Sleek steering position: wireless connection enhances the aesthetics of your bike while providing lightning-fast gear changes
• "Best durability. Uses two CR1632 batteries (battery life: 3.5 to 4 years)
• ・Compact and ergonomic performance derived directly from the DURA-.ACE
• "Raised handle tip improves ergonomics, while an elongated body increases hand support
• ・Personalize the DURA-ACE with adjustable button functions and ergonomics
• "Easily change button function with the E-TUBE app
• " Find your optimal lever position with a simple guard adjustment

Features

The new SHIMANO 105 brake/shift lever features the Di2 electronic system for the first time, so even more riders can enjoy precise and intuitive operation. The adjustable lever access (reach) and the customization of the buttons allow you to benefit from an ideal ergonomics