i guess you didn't understand the weight limit on those type of wheels and how much did your tractor weight PLUS you, i have purchase these type of wheels and used them on wagon as well as i am using these on my john deere pushmower and they are still going with no trouble after 9 years of normal useage and the bearing are still  rolling and the tires are still holding air and not weather cracked, and NEVER had any trouble with them, i will still buy them when i make new wagons with old radio flyer wagon parts, i wouldn't recommend using them on riding mowers, good day

Bought a pair of these tires for my dolly, used them once (properly inflated and under weight ratings). The next time I needed to use the dolly, the first tire was flat. I checked it and the rubber was cracked all around. I had to buy another one (non-flat this time). I was able to use the dolly once more, before the second tire was damaged, exactly the same way. The only thing I can say, is that I did go through some dirt (<50ft), but I would have expected these tires to be a little more durable than that (never in sun). See how it goes with the non-flats, same name brand. So much for going for the cheaper option!