9 inch wide wheels are the most common truck and SUV width — 245 to 275 mm tires sit square on the rim. This width appears most often on 20 inch, 18 inch, 17 inch wheels, and it is sized for 245 to 275 mm tires.
We list 18,417 wheels at this width. Width is what limits your tire choice: mount a tire that is too wide and the sidewall bulges, too narrow and the rim edge takes the hits. If you are between two widths, go with the one inside the tire manufacturer's recommended rim range.