I just got a pair of new Hi-Run 4.10 x3.50 x6 tires from Lowes for one of the mini bikes I'm getting parts together to build for my grandchildren, sweet price but the tread section of these new tires look awfully narrow to my eye, they measure 2.5 inches across the tread, is this pretty much what you get with these newer 4.10x3.50 tires, or is there other brands that are more true to size?