The Pro-Air Extra Heavy Duty Off-Road Tubeshave been constructed using Butyl which is hard-wearing and durable, and have a precision brass straight Scrader Valve.2.5mm thick heavy-duty Motorcycle inner tubesDurable and hard-wearing Butyl constructionExcellent performance, both on and off-roadPrecision straight brass Schrader valveThe Pro-Air Extra Heavy Duty Off-Road Tubes are 2.5mm thick for use on heavy-duty Motorcycles, and offer an excellent performance when riding on and off road.Please note - all codes in the drop down to purchase can be cross reference with Tube information in the specification table. Please check this information before making your choice and purchase.