but also like mentioned before, just the fact that you may be using two different tire models and companies will affect that also. one tire in a 205/50/15 could be stiffer then one in 205/40/17.
but also like mentioned before, just the fact that you may be using two different tire models and companies will affect that also. one tire in a 205/50/15 could be stiffer then one in 205/40/17.