Original K2 Softboot * Using carbon fiber in design is all about keeping the Radical Pro the lightest marathon skate in its class without any sacrifices * Built to deliver stability at the highest speeds possible, the Radical frame is an aluminum alloy frame heat-treated for increased stiffness * Wheels/Bearings: 100mm, 80a/ILQ-9 Pro * Lacing System: Dual Boa Closure System