Continental race king mtb tyre racesportworld champions when its dry the race king is faster cleaner and safer rolling resistance is almost on a par with race bike tyres its a proven winner with countless uci victories courtesey of the topeak ergon team with irina kalentieva at its head this racesport option guarantees significantly lower rolling resistance a serious option for xc racers specificationsetrtosizeweightbeadtechnologypsi rec inflationpsi max inflationplytpi50 55926x