Continental X-King 29inch Rigid MTB Tyre Super fast, nevertheless with a good grip, the X-King was developed with the Topeak Ergon mountain bike professional team. Despite pronounced studs, the X-King rolls off smoothly and very quietly. No matter if you are on your own or in a team, with Race and Mountain King, the super-light X-King easily covers many uses, ranging from cross country/race to All Mountain. The X-King simply leaves its competitors behind. The shoulder lugs provide absolute stability in curves negotiated at high speeds. The broad X-King range of options means there is a X-King choice for all types of Mountain Biker!