{"product_id":"pivotrax-90-100-16-3-25-3-50-16-2mm-butyl-inner-tube-tr4-straight-valve-heavy-duty","title":"PIVOTRAX 90\/100-16 (3.25\/3.50-16) 2mm Butyl Inner Tube — TR4 Straight Valve, Heavy-Duty","description":"\u003cp\u003e\u003cstrong\u003ePIVOTRAX 90\/100-16 (3.25\/3.50-16) is a heavy-duty 2mm butyl inner tube with a reinforced TR4 straight valve built for mini dirt bikes and pit bikes that need durable, reliable air retention on rough terrain.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis reinforced inner tube replaces worn or punctured tubes on 16-inch motocross and pit bike tires. Constructed from 2mm thick butyl rubber and fitted with a metal TR4 straight valve stem, it balances puncture resistance, consistent pressure retention, and straightforward installation. It’s specified to fit 90\/100-16 and 3.25\/3.50-16 tire sizes and is compatible with models such as the Honda CRF150R Expert (Big Wheel), CRF150F, Coolster QG-216, Baja DR125\/150, and many other mini bikes.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this inner tube stand up to rough trails and track use?\u003c\/h3\u003e\n\u003cp\u003eThe PIVOTRAX tube uses 2mm reinforced butyl rubber that absorbs impacts and resists punctures better than thin generic tubes. Its thicker construction reduces the chance of pinching and blowouts during aggressive riding while maintaining predictable handling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2mm reinforced butyl for improved durability and shock absorption\u003c\/li\u003e\n  \u003cli\u003ePuncture-resistant design to lower flats on rocks and roots\u003c\/li\u003e\n  \u003cli\u003eStable air retention for consistent tire pressure during runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this tube fit my bike and tire size?\u003c\/h3\u003e\n\u003cp\u003eThis inner tube is sized for 90\/100-16 and 3.25\/3.50-16 tires, the common 16-inch rims found on many mini dirt bikes and pit bikes. It is engineered to be a direct replacement for the listed models and will also suit other bikes that use the same tire dimension and rim configuration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntended for 90\/100-16 and 3.25\/3.50-16 tire dimensions\u003c\/li\u003e\n  \u003cli\u003eCompatible with Honda CRF150R Expert (Big Wheel) and CRF150F\u003c\/li\u003e\n  \u003cli\u003eFits Coolster QG-216, Baja DR125\/150 and similar pit bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the TR4 valve stem better for dirt bike use?\u003c\/h3\u003e\n\u003cp\u003eThe reinforced TR4 straight valve included with this tube is made from heavy-duty metal and designed to resist bending and leaking during tire changes and high-pressure use. Its seamless connection to the tube body minimizes leak points and stands up to the vibrations and impacts common in off-road riding.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMetal TR4 straight valve for strength and leak resistance\u003c\/li\u003e\n  \u003cli\u003eSeamless construction reduces potential air leaks\u003c\/li\u003e\n  \u003cli\u003eDurable under repeated mounting, dismounting, and high PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and maintain this inner tube for best results?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard inner tube procedures: partially inflate, seat inside the tire, mount on the rim, then fully inflate to the recommended pressure. Regularly check pressure, inspect for embedded debris, and avoid over-tightening valve caps to prolong tube life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-inflate slightly to avoid pinching during installation\u003c\/li\u003e\n  \u003cli\u003eInspect tire for sharp objects before fitting the tube\u003c\/li\u003e\n  \u003cli\u003eMaintain recommended tire pressure and check for slow leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Riders, mechanics, and pit crews who want a thicker, more puncture-resistant replacement tube for 16-inch mini dirt bike tires. It’s targeted at motocross and trail riders using Honda CRF150 variants, Coolster, Baja models, and other pit bikes that require durable performance and a dependable TR4 valve stem under off-road conditions.\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: Does this tube fit 3.25-16 tires?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The PIVOTRAX tube fits both 3.25\/3.50-16 and 90\/100-16 tire sizes used on mini dirt bikes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the TR4 valve metal and replaceable?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The TR4 valve provided is a reinforced metal straight valve integrated for durability; replacement requires tube swap or professional repair.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"PIVOTRAX","offers":[{"title":"Default Title","offer_id":67591320469689,"sku":"B0B2NNN3YB","price":69.21,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/pivotrax-front-view-packaging.jpg?v=1790547337","url":"https:\/\/redleafauto.ca\/products\/pivotrax-90-100-16-3-25-3-50-16-2mm-butyl-inner-tube-tr4-straight-valve-heavy-duty","provider":"Redleaf Auto","version":"1.0","type":"link"}