{"product_id":"tusk-severe-duty-3mm-motorcycle-inner-tube-90-100x21-reinforced-butyl-tr-4-valve","title":"TUSK Severe Duty 3mm Motorcycle Inner Tube 90\/100x21 - Reinforced Butyl, TR-4 Valve","description":"\u003cp\u003e\u003cstrong\u003eThe TUSK Severe Duty 3mm 90\/100x21 motorcycle inner tube is a heavy-duty butyl replacement with a TR-4 valve stem designed to resist punctures and handle rough off-road conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eRugged terrain demands tougher components, and this reinforced 3 mm inner tube from TUSK is built to be a longer-lasting substitute for worn, pinched, or punctured tubes. Crafted from high-quality butyl rubber and finished with a TR-4 valve stem, it balances durability with reliable air retention for dirt bikes and dual-sport machines running a 90\/100x21 front tire.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 3 mm thickness help during off-road rides?\u003c\/h3\u003e\n\u003cp\u003eThe extra 3 mm wall thickness adds a protective layer against thorns, rocks, and pinch flats that commonly damage thinner tubes. It doesn’t eliminate all punctures, but it significantly reduces the frequency of failures in challenging terrain while keeping inflation stable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3 mm reinforced butyl offers superior abrasion and puncture resistance\u003c\/li\u003e\n  \u003cli\u003eHelps absorb impacts that cause pinch flats\u003c\/li\u003e\n  \u003cli\u003eMaintains pressure longer between refills compared with thinner tubes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this tube fit my wheel and valve requirements?\u003c\/h3\u003e\n\u003cp\u003eThis specific tube is sized for a 90\/100x21 tire and comes with a TR-4 valve stem, the common valve for many off-road front wheels. Check rim compatibility and valve clearance before purchase to ensure a correct fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSize: 90\/100x21 — intended for corresponding tire dimensions\u003c\/li\u003e\n  \u003cli\u003eValve: TR-4 stem suitable for standard off-road rims\u003c\/li\u003e\n  \u003cli\u003eRecommended for front wheels matching the size and valve type\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the butyl rubber construction?\u003c\/h3\u003e\n\u003cp\u003eTUSK uses high-quality butyl formulated to resist air diffusion and wear under rough use. The material is flexible enough for installation while retaining strength to withstand repeated impacts and abrasive surfaces.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eButyl compound minimizes slow leaks and keeps pressure consistent\u003c\/li\u003e\n  \u003cli\u003eThicker cross-section increases lifespan in harsh conditions\u003c\/li\u003e\n  \u003cli\u003eManufactured for a balance of flexibility and tear resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard inner-tube fitting steps: partially inflate, seat into the tire, then fully inflate to recommended pressure. Routine checks for cuts, valve tightness, and proper seating will extend tube life and reduce roadside fixes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePartially inflate before mounting to prevent pinching\u003c\/li\u003e\n  \u003cli\u003eTighten valve stem and use a cap to keep out dirt\u003c\/li\u003e\n  \u003cli\u003eInspect after rides; replace if any deep cuts or leaks are found\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The TUSK Severe Duty 3 mm 90\/100x21 inner tube is aimed at off-road riders, trail riders, and dual-sport enthusiasts who need a tougher, longer-lasting tube for front wheels. If you regularly tackle rocky trails, brush, or sections that cause frequent flats, this reinforced butyl tube with a TR-4 valve offers a practical upgrade over standard thin-walled tubes without adding excessive weight.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the TUSK 3mm tube compatible with rear wheels?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This 90\/100x21 tube is intended for front wheel sizes; verify your rear tire size before using it as a rear replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the TR-4 valve be used with tubeless-ready rims?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: TR-4 valves work with many tubed setups; tubeless-ready rims often need a tubeless valve and sealant instead.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TUSK","offers":[{"title":"Default Title","offer_id":48085611380894,"sku":"B0CSP9X865","price":37.27,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/tusk-severe-duty-inner-tube-front-view.jpg?v=1785874172","url":"https:\/\/northtrailauto.ca\/products\/tusk-severe-duty-3mm-motorcycle-inner-tube-90-100x21-reinforced-butyl-tr-4-valve","provider":"North Trail Auto","version":"1.0","type":"link"}