SERVO WAVE ACTION technology is a mechanism in Shimano brake handles in which the power ratio is not dependent on the swing of the handle, but can be changed manually.

I-SPEC EV brake levers feature increased stiffness by moving the caliper inwards and increasing the contact point between the handlebars and the lever. This additional rigidity significantly improves braking precision and control of the bike, without taking up space between the caliper and the attachment points of other accessories on the handlebars. The large adjustment range of the levers makes it possible to adapt them to different riding styles, physiques and preferences.