{"product_id":"ar-pro-2-75-3-00-21-motorcycle-inner-tubes-21-tr4-straight-valve-2-pack-thick-butyl","title":"AR-PRO 2.75\/3.00-21 Motorcycle Inner Tubes 21\" TR4 Straight Valve 2-Pack Thick Butyl","description":"\u003cp\u003e\u003cstrong\u003eAR-PRO 2.75\/3.00-21 replacement inner tubes are heavy-duty butyl rubber tubes with TR4 straight valve stems designed to fit 21\" motorcycle wheels (2.75–3.00\" width) and sold as a convenient 2-pack.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you ride a motorcycle with 21\" rims and tire widths between 2.75\" and 3.00\", having a durable spare inner tube is essential for quick repairs and confident riding. These AR-PRO tubes are built from thick premium butyl rubber for durability, include a straight TR4 valve stem, and are sized to match common 21\" front and rear applications. They offer a cost-effective alternative to OEM parts while aiming to preserve ride comfort and puncture resilience.\u003c\/p\u003e\n\n\u003ch3\u003eWill these inner tubes fit my 21\" motorcycle tire?\u003c\/h3\u003e\n\u003cp\u003eYes — these tubes are sized to accommodate tires with a 21\" rim and widths from 2.75\" to 3.00\". They are compatible with several common 21\" tire profiles, so you can use them for many front wheel applications and some rear setups depending on tire size.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 2.75\/3.00-21 sizing and tire codes like 90\/80-21, 90\/90-21, 100\/80-21\u003c\/li\u003e\n  \u003cli\u003eDesigned for 21\" rim diameters; confirm tire width before purchase\u003c\/li\u003e\n  \u003cli\u003eIncludes TR4 straight valve stem standard for many motorcycle rims\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and puncture-resistant are these tubes?\u003c\/h3\u003e\n\u003cp\u003eThe AR-PRO tubes use thick butyl compound formulated for strength and low air permeability. That construction helps resist punctures and slow leaks while providing reliable air retention for extended rides.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThick premium butyl rubber for improved toughness\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty build reduces risk of pinch flats and quick failures\u003c\/li\u003e\n  \u003cli\u003eMaterials chosen to limit air loss over long periods\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eInstalling an inner tube is straightforward and can typically be completed in under five minutes once the tire is off the rim. No specialized equipment is necessary beyond common tire levers and a pump, making roadside or garage replacements quick and practical.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTR4 straight valve fits standard valve hole without adapters\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard tire levers and a hand pump or compressor\u003c\/li\u003e\n  \u003cli\u003eQuick two-person or solo installation for routine repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat riding conditions are these tubes suited for?\u003c\/h3\u003e\n\u003cp\u003eThese inner tubes are built to perform across a wide range of everyday conditions, from paved roads to light off-road trails. While designed for durability and general use, they are not a substitute for specialty race or extreme off-road tubes engineered for specific competitive needs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuitable for street, commuting, adventure, and light trail use\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty design offers reliable performance in varied weather\u003c\/li\u003e\n  \u003cli\u003eSold as a 2-pack so you have a spare ready for quick repair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Riders who need dependable, cost-effective replacement inner tubes for 21\" wheels will find the AR-PRO 2.75\/3.00-21 two-pack practical. It’s a good choice for motorcyclists who want a thicker butyl tube for improved puncture resistance and comfort, riders who prefer to carry a spare for roadside repairs, and anyone replacing a worn or damaged tube without paying OEM prices.\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 the TR4 valve fit standard motorcycle rims?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The TR4 straight valve is a common size and fits most 21\" rims without adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these tubes sold as singles or a pack?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They come as a 2-pack, giving you a spare for quick roadside replacement.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AR-PRO","offers":[{"title":"Default Title","offer_id":67594803445945,"sku":"B07J1P4FM5","price":62.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/ar-pro-front-packaging-view_1a0d4d5c-eb62-4559-8945-dee666c16192.jpg?v=1790585250","url":"https:\/\/redleafauto.ca\/products\/ar-pro-2-75-3-00-21-motorcycle-inner-tubes-21-tr4-straight-valve-2-pack-thick-butyl","provider":"Redleaf Auto","version":"1.0","type":"link"}