Shimano ST-T400 is a bicycle brake lever that is equipped with a mode switching mechanism to make it compatible with V-brakes with power modulator (BR-T400) and cantilever brakes and roller brakes. This brake lever is designed to provide superior wet weather braking performance and consistent braking performance in a variety of conditions. The power modulator feature makes it easier to control braking by increasing the cable stroke at the brake lever within a certain constant range of braking force.