Shimano 105 ST-R7120 12 Speed Shifter + Flat Mount Caliper Size:Left Shifter / Rear Brake our new mk2 tubeless valves

our new mk2 tubeless valves are now compatible with all rim inserts and come with a spoke key cap as well as a valve core removal cap

The dual pivot design also accounts for wider road tires without compromising braking power

The chain should be VERY clean and dry before applying (CyclingTips has an Awesome Chain Cleaning Guide HERE)

Reduce brake fade on long descents with the Shimano RT-MT800 Rotor

typically reserved for use on military hardware

Shimano 105 ST-R7120 12 Speed Shifter + Flat Mount Caliper Size:Left Shifter / Rear Brake our new mk2 tubeless valvesThe 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.