Once on the dirt we aired the narrow BFG tires from Summit Racing down to about 10 psi. The tires work great everywhere we have run them so far and look awesome on the retro Wheel Vintiques wheels. We did notice that the tires did tend to follow ruts in sand a bit more easily than wider tires would. It makes sense that they would provide a little less flotation in the soft stuff. The retro looks get lots of attention.