Shimano Tiagra ST-4725/BR-4770 Mechanical Shift/Hydraulic Brake Lever and Caliper - Flat Mount, Resin Pads - The Shimano Tiagra ST-4720 hydraulic shift/brake lever brings the all condition confidence and refined ergonomics of hydraulic disc brakes to the quick and intuitive shifting cyclists expect from Shimano Tiagra. 2x10-speedST-4725 offers greater confidence and control for riders with smaller hands in all conditionsDual control lever includes reach adjust mechanismBR-4770 hydraulic disc brake caliper offers greater rider control in all conditions2 piston caliper features Shimano's One Way Bleeding technology for simple maintenance