{"product_id":"core-heavy-duty-tube-20-x-3-5-4-5-sv","title":"Core Heavy Duty Tube - 20 x 3.5 - 4.5” SV","description":"\u003cp\u003eDesigned for durability and reliable performance, this 20 x 4.0 bicycle inner tube is constructed from high-quality butyl rubber for excellent air retention and long-lasting use. Engineered to withstand demanding riding conditions, it features enhanced puncture resistance for added confidence on rough terrain. Ideal for fat bikes, e-bikes, and wide-tire applications where reliability and toughness are essential.Specifications Size: 20 x 4.0 Weight: 0.45kg (1.0lb) Wall Thickness: 1.5-2mm Valve Type: AV (Schrader) – 35mm Material: 100% Premium Butyl Rubber Tensile Strength: 7 MPa Color: Black Key Feature: Thorn-resistant construction for improved puncture protection\u003c\/p\u003e","brand":"Core","offers":[{"title":"Default Title","offer_id":50614097412343,"sku":"CR-TU-BU-01","price":19.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/3247\/6407\/files\/1208498.jpg?v=1774142397","url":"https:\/\/primebicyclegear.com\/products\/core-heavy-duty-tube-20-x-3-5-4-5-sv","provider":"Prime Bicycle Gear","version":"1.0","type":"link"}