I'm as into these as the next person, but this is not a substitute for a real set of 4wd wheels needed on a farm or rural property, which is the practical application others seem to think it's for. With a 600 lb payload (including people), you can't even cart a single cubic yard of mulch. Forget gravel, dirt, sand, etc. It's cool if super cheap, or if you're rich and want something fun to bang around in addition to your actual machines. But give me a used Taco anyday (and a Deere gator for the woods stuff).