Shimano 105 ST-R7170-RE Di2 Shift/Brake Lever BR-R7170 Hydraulic Disc Brake Caliper - Rear 12-Speed Flat Mount BLK MFPN=11654176 it offers a lightweight yet

it offers a lightweight yet sturdy option for serious cyclists

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The ultralight construction also limits rotational mass above the bead

Shimano 105 ST-R7170-RE Di2 Shift/Brake Lever BR-R7170 Hydraulic Disc Brake Caliper - Rear 12-Speed Flat Mount BLK MFPN=11654176 it offers a lightweight yetShimano 105 ST R7170 RE Di2 Shift Brake Lever with BR R7170 Hydraulic Disc Brake Caliper Rear 12 Speed Flat Mount Black. The 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