Core Heavy Duty Tube - 26 x 3.5 - 4.5” SV

Built for wide-tire performance and demanding riding conditions, this 26 x 4.0 bicycle inner tube is made from premium butyl rubber to deliver excellent air retention and long-term durability. Its reinforced rubber compound enhances puncture resistance, helping reduce flats caused by thorns and trail debris.Ideal for fat bikes and e-bikes where strength, reliability, and confidence matter most. Specifications Size: 26 x 4.0 Weight: 0.55kg (1.21lbs) 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