The Schwalbe Billy Bonkers K Guard SBC Active Line 26x2.10 Classic Skin Tyre is lightweight (490g Performance Line) and not only rolls extremely easily, it also ensures fun loving and agile riding. If tricks and jumps get messed up, Billy Bonkers remains good natured, forgiving even egregious mistakes.Schwalbe Billy Bonkers Tyre FeaturesMaximal micro teeth for grip on dusty and sandy groundClosely positioned blocks multiply the grippy edgesSmall ramps increase the speed of the tyre. The result: More Airtime!