I purchased these 13" tires last October from Harbor Freight Tools thinking that they would fit on my chipper-shredder, but found out that they were the wrong size. And, to further complicate matters, I literally bought two different models! One is their Model 67467 (Haul Master 13" pneumatic tire with black hub), and the other is their Model 67469 (Haul Master 13" Flat Free tire with Powder Coated).
The pneumatic tire sells for $15, and the flat free tire sells for $22, so I am asking for $12 and $20 respectively, or $30 for both.
If you need more detailed specs, here are the links for each:
https://www.harborfreight.com/13-inch-x-4-inch-pneumatic-tire-67467.html
https://www.harborfreight.com/13-5-32-inch-x-3-7-16-inch-flatfree-tire-67469.html