23126TUBE - 533-823BÂ FIRESTONE HEAVY DUTY NATURAL RUBBER TUBE SIZE 23.1 X 26Â Rear tractor, front tractor, flotation, forestry, L&G and drag racing sizes. Valve is 0.81'' long and is designed to lock into rim hole using LN10 rim nut (supplied). Not bendable. Rim hole 0.625. Maximum inflation 150 psi. Made for liquid ballast.