Two months ago, I replaced a tube tire that needed air every week, with a flat free tire. And I really enjoy the other ones - for my handtruck. They don't squash sidesways when moving stones and blocks on a slight slope. We use heavy equipment too, but the handtruck and wheelbarrow get regular use. With the handtruck, I just needed to drill the kotter pin hole a speck bigger. The wheel metal was about 1/16" thicker.