I have never heard of this brand but I would not be concerned about buying them, especially if I garaged my tractor. The biggest tire-killer today is UV rays that tend to suck the life out of the top layer of rubber and cause cracking. Even though cracking/checking is annoying to see, tires with that problem continue to give excellent service for many, many years. These a 6 ply and that makes for a tough carcass. Secondly, no one can afford to put out a garbage product today because the internet will destroy you faster than you can say Rumplestiltskin. The fact that you just mentioned Harvest King tires in this thread means that anyone using Google or other search engines will be notified we were talking about that brand. If you do end up buying them and then report your pleasure or displeasure with those tires, then other potential buyers will see what you wrote.