Tusk Ultra Heavy Duty 4 mm Motorcycle Inner Tube 80/100×21 - Reinforced Butyl, TR‑4 Valve, Extreme Durability

For riders pushing the limits, the Tusk ultra heavy duty 4 mm motorcycle inner tube in size 80/100×21 is engineered for maximum resilience. Its thick, reinforced 4 mm wall helps resist punctures, pinch flats, and rock strikes that thinner tubes can’t survive. Built from quality butyl rubber, this tube offers excellent flexibility under load, dependable air retention, and resistance to aging or environmental stress. The centered TR‑4 valve stem provides compatibility with most rims and ease of inflation. Whether you’re replacing a damaged tube or carrying a backup for grueling trails, this tube is designed to handle the abuse. Use it wherever your riding demands extra peace of mind. Note: Confirm that your tire and rim dimensions match 80/100×21 before installation. Always check rim edges for sharpness or damage to protect your tube.

• Reinforced 4 MM Wall Thickness - gives extra protection in harsh terrain
• Premium Butyl Rubber Ronstruction - durable, flexible, and reliable
• Centered TR‑4 Valve Stem - fits most rims and simplifies inflation
• Precise 80/100×21 Sizing - matches many dual‑sport front tire dimensions
• Ideal Spare or Upgrade - built for extreme use and extended reliability