The MICHELIN Heavy Duty Inner Tube 80/100-21 is crafted from durable butyl rubber, providing excellent air retention and puncture resistance for off-road and heavy-duty use. Designed to fit a range of wheel sizes including 2.5-21", 2.75-21", 3.00-21", 80/90-21", 90/90-21", 80/100-21", and 90/100-21", it offers versatility for various motorcycles and dirt bikes. Its robust construction ensures reliability under tough riding conditions, helping to maintain consistent tire pressure and improve overall ride stability. This inner tube is an essential choice for riders seeking long-lasting performance and peace of mind on demanding terrains.