20x4.0 (100/114-406) (2-PCS) Heavy Duty Bike Tubes Premium Butyl Rubber with Schrader Valve 40mm Inner Tubes Compatible for 20 x 4.0 20x4 20x4.5 E-Bike/Electric/Mountain Fat Bike Tires Tubes(E-002)

Package Contents: 2 pcs 20x4.0 AV40mm Schrader Valve heavy duty bike tubes

• Diverse Compatibility：Fits fat tire 20"x4.0"-4.5" AV40mm Schrader Valve (100/114-406),Compatible Size 20x4.0 20x4 20x4.5 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 20x4.0 AV40mm Schrader Valve heavy duty bike tubes