Replacement Inner Tube, Rubber, Not Applicable Tread, 4.1 / 3.50 -4, 8 7/8 in Tire Dia., 2 1/2 in Tire Width, Inner Tube Tire Style, 5/16 in Valve Stem Dia., Valve Stem Style Angled Stem. This item has been restricted from sale in the following state (s): []