https://www.tireinnertube.com/46-inch-rim-diameter-tire-inner-tubes/277-208r46-air-loc-radial-farm-tractor-tire-inner-tube-tr218-stem.html
20.8R46 Air-Loc Radial Farm Tractor Tire Inner Tube TR218 stem
Tube will be identified with: 20.8R46 Fits Sizes: 20.8-46, 20.8R46, 520/85R46 MPN: TU0936
tire inner tubefarm tractor