Package Contents: 2 pcs 26x4.0 AV40mm Schrader Valve heavy duty bike tubes Diverse Compatibility：Fits fat tire 26 x4.0 -4.5 AV40mm Schrader Valve (100/114-406),Compatible Size 26x4.0 26x4 26x4.5 for E-Bike,Electric Bike,Mountain Bike Durability upgrade:Made of high-quality butyl rubber，excellent resistance to ozone cracking, weathering, or aging, the tensile strength of the rubber is increased by 20%, durability by 10%, weight is reduced by 10%, and rolling resistance is decreased by 10% Air tightness upgrade: The custom sidewall is thickened by 20%. The thickness upgrade makes it more difficult for air pressure to leak, and the tire pressure will be maintained for a longer time and more stably. Even easier to inflatable: Customize extended 40mm schrader valve, common to the current models of wheels, inflatable convenience greatly increased Package Contents: 2 pcs 26x4.0 AV40mm Schrader Valve heavy duty bike tubes ASIN B0FSWX9WNJ Size 26x4.0 Bike Type Mountain Bike Brand Name EXTREWIND Item Width 4 Inches Valve Type Schrader Wheel Size 26 Inches Manufacturer EXTREWIND Valve Length 40 Millimeters Item Diameter 26 Inches Material Type Butyl Rubber Included Components 2 pcs 26x4.0 AV40mm Schrader Valve heavy duty bike tubes Warranty Description 365 days Compatible Tire Width Maximum 114 Millimeters Compatible Tire Width Minimum 40 Millimeters