The Air-Liner Light XC, weighing just 55g, delivers outstanding performance in puncture protection and riding comfort, ensuring up to 25km of run-flat capability when ridden cautiouslyCompatible with 29` wheels featuring rim channels ranging from 25 mm to 30 mm and tires with widths between 2.1` and 2.4`This insert is designed exclusively for tubeless tires and must be used with multiway tubeless valves (included) and ammonia free sealant onlyEach package includes one insert and a 40mm Vittoria Multiway tubeless valve29x2.1-2.4SingleUPC/EAN/GTIN: 8022530029988