{"product_id":"yunscm-700c-heavy-duty-bike-inner-tubes-700x44-50c-av48-schrader-valve-2-pack-thick-butyl-for-gravel-commuter","title":"YunSCM 700C Heavy-Duty Bike Inner Tubes 700x44–50C AV48 Schrader Valve — 2-Pack, Thick Butyl for Gravel \u0026 Commuter","description":"\u003cp\u003e\u003cstrong\u003eYunSCM 700C heavy-duty inner tubes provide a reinforced, long-lasting replacement for 700x44–50C bicycle tires with an AV48 Schrader valve in a convenient 2-piece pack.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese 700C tubes are engineered for riders who need more puncture resistance, better air retention, and stronger shock absorption than standard thin tubes. Constructed from thicker butyl and EPDM-blend rubber, they fit a wide range of 700c tires (44–50mm) commonly used on gravel, hybrid, commuter, electric and some mountain setups. The result is a tube built to tolerate heavier loads, rough surfaces, and less frequent inflation while remaining simple to install and compatible with Schrader valve pumps.\u003c\/p\u003e\n\n\u003ch3\u003eWill these tubes fit my tire size and valve type?\u003c\/h3\u003e\n\u003cp\u003eYes — they are sized for tires with nominal widths from 44mm to 50mm (44-622 through 50-622) and use an AV48 Schrader valve, which fits standard Schrader pump heads and presta adapters are not required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 700x44C, 700x45C, 700x46C, 700x48C, 700x50C (28×1 1\/2)\u003c\/li\u003e\n  \u003cli\u003eValve stem length: 48mm Schrader (AV48), suitable for most rims\u003c\/li\u003e\n  \u003cli\u003eWorks on gravel, hybrid, cruiser, some e-bike and commuter tires within the listed range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and puncture-resistant are these heavy-duty tubes?\u003c\/h3\u003e\n\u003cp\u003eThe tubes use a thicker butyl compound plus EPDM that increases wall thickness and toughness versus standard inner tubes. That thicker construction boosts resistance to abrasion and common puncture sources while also improving air-holding ability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApproximately 40% thicker walls than ordinary butyl tubes\u003c\/li\u003e\n  \u003cli\u003eEnhanced puncture resistance for longer service life\u003c\/li\u003e\n  \u003cli\u003eBetter abrasion tolerance for rough roads and heavier loads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long will they retain air and reduce maintenance?\u003c\/h3\u003e\n\u003cp\u003eImproved elasticity and compound quality increase airtightness so the tubes keep higher pressure for extended periods, which means fewer top-ups and more consistent ride feel over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned to maintain pressure for months under normal use\u003c\/li\u003e\n  \u003cli\u003eReduced frequency of inflation compared with standard butyl tubes\u003c\/li\u003e\n  \u003cli\u003eStability of pressure helps maintain handling and safety\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these tubes easy to install and serviceable on the road?\u003c\/h3\u003e\n\u003cp\u003eYes — the 700x44–50C size installs using the same steps as any inner tube, and the Schrader valve simplifies pumping without adapters. Basic pre-install checks and a quick water leak test will help avoid surprises after fitting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStandard installation procedure: partially inflate, seat bead, then fully inflate\u003c\/li\u003e\n  \u003cli\u003eTip: submerge inflated tube in water to check for leaks before install\u003c\/li\u003e\n  \u003cli\u003eComes as a pair so you can replace both wheels or carry a spare\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? These YunSCM heavy-duty 700C tubes are best for riders who use wider 700c tires (44–50mm) and want fewer flats, improved air retention, and stronger sidewall protection — ideal for gravel cyclists, commuters, electric-bike users carrying extra weight, and recreational riders seeking a more robust upgrade over stock tubes. If you prioritize durability and lower maintenance over saving a few grams of weight, these tubes offer a practical, budget-friendly solution delivered in a two-pack for immediate replacement or on-the-road backup.\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: Will these inner tubes work with Presta valves?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, these tubes use a 48mm Schrader (AV48) valve and require a Schrader-compatible pump or adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many tubes come in the package?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The package includes two YunSCM heavy-duty 700x44–50C inner tubes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YunSCM","offers":[{"title":"Default Title","offer_id":59349587296604,"sku":"B09D7FS6QF","price":36.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1059\/5604\/9244\/files\/yunscm-front-packaging-700c-tubes_508faa61-0465-456e-b48a-4bc3210dae57.jpg?v=1791100353","url":"https:\/\/sportium.co.uk\/products\/yunscm-700c-heavy-duty-bike-inner-tubes-700x44-50c-av48-schrader-valve-2-pack-thick-butyl-for-gravel-commuter","provider":"Sportium Sports And Outdoors","version":"1.0","type":"link"}