{"product_id":"maxxis-tube-extra-heavy-duty-80-90-100-21-tr4-csv","title":"Maxxis Tube Extra Heavy Duty 80\/90\/100-21 TR4 (CSV)","description":"\u003cp\u003e\u003c\/p\u003e\u003cdiv\u003e\n\u003cbr\u003e\u003cp\u003eMeet the Maxxis Tube Extra Heavy Duty 80\/90\/100-21 TR4 (CSV) — a purpose-built inner tube designed for 21-inch dirt and dual-sport wheels. Built to withstand rugged trails, aggressive riding, and long days in the saddle, this tube keeps your front end predictable when the terrain gets rough and the pace increases.\u003c\/p\u003e \u003ch2\u003eWhy this tube stands out\u003c\/h2\u003e\n\u003cbr\u003e\u003cul\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003eExtra-heavy-duty construction\u003c\/strong\u003e with a robust butyl formulation that resists pinch flats and slow-air loss on harsh off-road surfaces.\u003c\/li\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003ePrecisely sized for 21-inch rims\u003c\/strong\u003e compatible with 80\/90-21, 90\/90-21, and 100\/90-21 tire combinations, so you get a reliable, snug fit that seats cleanly on installation.\u003c\/li\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003eTR4 (CSV) design\u003c\/strong\u003e aligns with modern 21-inch rims to promote secure bead seating, stable air pressure, and dependable performance under load.\u003c\/li\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003eReinforced valve area\u003c\/strong\u003e and sturdy shoulder construction to resist impact and bending during tall jumps, rocky descents, and aggressive cornering.\u003c\/li\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003eConsistent air retention\u003c\/strong\u003e minimizes downtime on the trail, helping you focus on riding rather than tire maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cbr\u003e\u003cstrong\u003eReal-world durability\u003c\/strong\u003e built for enduro, off-road, and adventure riders who push their bikes through hot, dusty, and muddy conditions.\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal for who and when\u003c\/h2\u003e\n\u003cbr\u003e\u003cp\u003eThis inner tube is tailor-made for riders with 21-inch front wheels who value reliability over rough terrain. It’s a strong choice for enduro events, long-distance trail rides, desert runs, and daily-teardown adventurers who don’t want to worry about punctures or air leaks after a tough climb or rock garden.\u003c\/p\u003e \u003ch2\u003eUse cases and practical benefits\u003c\/h2\u003e\n\u003cbr\u003e\u003cul\u003e \u003cli\u003e\u003cstrongenduro and trail riding:\u003e maintain steady grip by keeping tire shape under lower pressures for better feel and control on loose surfaces.\u003c\/strongenduro\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongadventure motorcycles with front wheels:\u003e dependable performance on mixed-terrain routes where flats are more likely.\u003c\/strongadventure\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongrough terrain endurance:\u003e fewer interruptions due to deflation, so you can ride longer between top-ups.\u003c\/strongrough\u003e\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e \u003ch2\u003eTips for best results\u003c\/h2\u003e\n\u003cbr\u003e\u003cul\u003e \u003cli\u003eInspect the tube for defects before mounting, and align the valve stem with the rim’s valve hole to ensure a clean seating.\u003c\/li\u003e \u003cli\u003ePair with a compatible rim tape and proper rim width to optimize bead seating and prevent pinch flats during hard landings.\u003c\/li\u003e \u003cli\u003eInflate to the rider and tire manufacturer’s recommended range after mounting, then recheck after a short ride to confirm even seating.\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Maxxis Tube Extra Heavy Duty 80\/90\/100-21 TR4 (CSV) is a thoughtful upgrade for riders who demand durability, dependable air retention, and consistent performance from their 21-inch front tires. When the ride gets tough, this tube keeps you moving with confidence.\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/div\u003e","brand":"A1 Accessory Imports","offers":[{"title":"Default Title","offer_id":44973759299653,"sku":"35-21-080EHD","price":44.95,"currency_code":"AUD","in_stock":false}],"url":"https:\/\/shop.ampedsuperstore.com.au\/products\/maxxis-tube-extra-heavy-duty-80-90-100-21-tr4-csv","provider":"Amped Superstore","version":"1.0","type":"link"}