You may want to double check but I think the A/R stocker tires section width is wider than 8 inches I know most all street stock tires are all considered 8 inch tires but some measure 9 and as much as 10, I know this doesnt fly at Woodhull for open races it needs to be a true 8 inch tire like the A/R 245/70 which is a true 8 inch tire as opposed to the dirtcar A/R 265/65 which is wider than 8 inches, same with the dirtcar Hoosiers, maybe Thunder mountain doesnt go by this rule but you may want to look into it in case they have measuring tape out when u get there.