Originally Posted by orange05tj
that just helps calculate speed. Im trying to figure out if a 235/75/15 is closer to a 31x10.50 or what size is close to it.
235 is the amount of mm across the tread width. 75 is the percentage of 235, as the hight of the side wall.
235mm = 9.25 in
9.25in x .75 = 6.94in (sidewall)
6.94 x 2 = 13.875 = 15 (rim) = 28.875
so those tires would be 28.875 (29in) x 9.25in (9.5) x15
Hope that helps make your decision easier.