Custom replacement inserts for use with Uberbike finned disc brake pads. Our E-Matrix disc brake pads are based around our Race Matrix pad compound but modified for greater endurance, adding a unique blend of kevlar, ceramics, heat resistant resins and friction materials to be able to withstand the increased weigh and speeds of electric bikes and demanding riding styles such as downhill. For use with Hope Tech 3 E4 and Race Evo E4 disc brake systems.