I looked at the Amazon link. The trailer is intended for bicycle use. Those tires are probably not meant for speeds greater than 30 and under constant use. I will admit, the trailer is a cool idea, but not something I would use on any highway or for more than a few miles. You'd get sued out here by the cell phone toting soccer mom in her lifted F-150 if she broke a nail trying to avoid you when you get a flat on that trailer.... Crazy world, I tell ya.