Hope tech 3 x2 disc brake we 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 our 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 any free play and ini