Hope v4 complete caliper revised one piece caliper cnc machined from a solid billet of 2014 t6 aircraft spec aluminium alloy increased caliper stiffness for better efficiency as well as increased pad surface area for better heat management and pad life the new v4 as a complete unit inc rotor is lighter than the previous v2 model features 5 power increase over tech evo master cylinder new piston dust cover design new reservoir diaphragm design 2014 t6 aluminium alloy wide angle hose connecto