Extra Thick 2 mm Wall — provides stronger puncture resistance versus standard tubes Premium Butyl Rubber — good air retention and resistance to aging / heat Centered TR-4 Valve Stem — fits common rim designs and allows easy inflation Precise 80/100×21 Sizing — engineered to match common 21" front tire dimensions Reliable Backup or Replacement — ideal for trail use, daily repair kit, or upgrade The Tusk heavy duty 2 mm motorcycle inner tube in size 80/100×21 is built for riders who want more durability than typical stock tubes. The added thickness helps resist pinch flats and abrasion when riding challenging terrain or over sharp edges. Made from quality butyl rubber, this tube balances flexibility with strong air retention and longevity. The TR‑4 valve stem is centered for compatibility with most rims, ensuring dependable access for inflation. Whether you're repairing a damaged tube or carrying a trusted spare for off‑road rides, this tube is ready. Its 80/100×21 specification fits many 21" front tires used in dual sport and enduro setups. Important note: Always verify your tire and rim compatibility before installation and ensure there is no rim damage or sharp edges. Use this tube for trail, street, or mixed terrain riding. It makes a practical upgrade over standard tubes, and a reliable option to carry in your toolkit.