Firestone Brand Tire Inner Tube TR15 Rubber Valve Multi Size 16.5" Fits 8.00-16.5 8.00R16.5 8.75-16.5 8.75R16.5 For use in both Radial and Bias Tire Applcations TR15 Rubber Valve Multi sizr fitment 800-16.5 8-75-16.5