Shimano 105 ST-R7120 12 Speed Shifter + Flat Mount Caliper Size:Left Shifter / Rear Brake If your rim width doesn't

If your rim width doesn't match up exactly with our sizes below

Super fast shifting and amazing smoothness of pedaling

5 and 92mm case width's

Steady Flash

Shimano 105 ST-R7120 12 Speed Shifter + Flat Mount Caliper Size:Left Shifter / Rear Brake If your rim width doesn'tThe 105 disc brake combines BR R7170 caliper and ST R7120 shift brake lever for 2x or 12 speed shifting. It has 10% more pad clearance for quieter braking, plus powerful and controllable deceleration. One Way Bleeding makes it easy to maintain. The two piece aluminium caliper is light and fits any bike. The ST R7120 shift brake lever has a revised ergonomic design, reduced reach, and weighs 200g more than its electronic counterpart.