Durable and reliable, BikeMaster® Natural Rubber Inner Tubes with TR6 valve stems are built for motocross and off-road riders who demand long-lasting performance. Made with a high-quality natural rubber compound, each tube features seamless construction and increased wall thickness to reduce the risk of pinch flats and punctures—perfect for aggressive trail or track use. Natural rubber compound for flexibility and strength Reinforced TR6 valve stems Increased wall thickness for added puncture resistance Seamless construction Individually boxed and labeled by size and part number Typical Tube Thickness Standard 2mm Heavy Duty 3mm Extra Heavy Duty 4mm