FixedNeed to pay for 1 or 2 sizes bigger then what you normally wear
Every interco tire is different; i had 39.5/13.50 iroks on 15x10’s and they measured 38/15 and then 42/14.50 iroks on h1’s and they were 40.5/13.5. So all over the map, not even consistent differences, even same model tire.