natural rubber bicycle tube 1.A/V, E/V, F ... CCC 4.delivery date:25 days NATURAL RUBBER BICYCLE TUBE we take this opportunity to introduce ourselves ... bicycle tire , we can produce normal bicycle tire, color bicycle tire and electric bicycle tire For bicycle tube , we have natural rubber tubes and butyl tube ... are the available sizes for your selection.BICYCLE TUBE SIZES28x1 1/214x1.75/2.12526x1 3/812x1 ...