FITS BOTH SIZES IN RADIAL AND BIAS TIRES. This tube fits 16.9-46 18.4-46 16.9R46 18.4R46. Has a TR-218 air/water valve stem for tractor tires. MAY BE USED IN BOTH RADIAL AND BIAS PLY TIRE APPLICATIONS.Valve Height 1-7/8", Diameter 0.625". 50 YEARS IN THE TIRE BUSINESS. The item "16.9-46 18.4-46 16.9R46 18.4R46 Farm Tractor Tire Inner Tube Heavy Duty TR218" is in sale since Friday, February 19, 2016. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Wheels, Tires & Parts\Other". The seller is "tiregeek-com" and is located in Saint Louis, Missouri. This item can be shipped to United States.