This is the hope tech 3 v4 rear brake set hope have kept the key features of the tech evo master cylinder and worked to improve the ergonomics and integration on the handlebars the tech 3 master cylinder can operate all the calipers from the range and offers a slight increase of power of about 5 over the tech evo popular design features of tech evo remain the same such as the reach and bite point control bpcadjustability the piston is actuated by a cam and a roller system to eliminate an