105 ST-R7170 Di2 Shift/Brake Lever with BR-R7170 Disc Brake Caliper Options:105 ST-R7170-R Di2 Shift/Brake Lever with BR-R7170 Hydraulic Disc Brake Caliper - Rear, 12-Speed, Flat Mount, Black High strength and flexible carbon-iron

High strength and flexible carbon-iron steel FEC alloy rails

A moderate compression sock that sits above the ankle with extra nylon in the heel and toe for added durability

While the special padding (Total Gel) allows better shock absorbing in every condition

cartridge-based architecture

105 ST-R7170 Di2 Shift/Brake Lever with BR-R7170 Disc Brake Caliper Options:105 ST-R7170-R Di2 Shift/Brake Lever with BR-R7170 Hydraulic Disc Brake Caliper - Rear, 12-Speed, Flat Mount, Black High strength and flexible carbon-ironThe Shimano 105 ST R7170 Di2 Shift Brake lever features Di2 electronic shifting for precise, intuitive gear changes to even more riders. The 105 BR R7170 caliper features the Shimano Flat Mount System and its low profile design that is ideal for road bikes. Reach adjustment and customized button functions allow you to dial in your ideal ergonomics Creates a clean cockpit with wireless connection and enhances the aesthetic of your bike while keeping