Description The Schwalbe Billy Bonkers tyres are the go-to dirtjump & pumptrack tyre for those building up a 90s mountain bike. SAY HI TO BILLY BONKERS! SCHWALBE’S NEW TIRE FOR PUMPTRACK, DIRTJUMP AND SLOPESTYLE. This lightweight tyre not only rolls extremely easily, it also ensures fun and agile riding. If tricks and jumps get messed up, Billy Bonkers remains good natured; forgiving even egregious mistakes. Maximal micro teeth for grip on dusty and sandy ground. Closely positioned blocks multiply the grippy edges. Small ramps increase the speed of the tire. The result: More Airtime! Schwalbe Billy Bonkers tyre specs ETRTO: 54-559 (26 x 2.1″) Bead: Folding Compound: ADDIX Seal: Tube (not tubeless compatible!) Colour: Bronze Sidewall Weight: 500 g Load: 100 kg Pressure: Max. 80 PSI, Min. 30 PSI