Shimano ST-R7120 105 Mech Discbrake Shifter 12s + BR-R7170 Brake CalipersShimano 105 ST R7120+BR R7170 2x12 speed Disc Brake Set The Shimano 105 2 x 12 speed STI levers ST R7120 with BR R7170 Flat Mount calipers for hydraulic disc brakes feature excellent deceleration performance and offer pure mechanical shifting pleasure for the purest form of road cycling. MECHANICAL PERFECTION: Shimano 105 2x12 speed STI Dual Control ST R7120 + BR R7170 Disc Brake Set The mechanical 105 is a tribute to mechanical shifting the purest