[Cameron Parsons]

In terms of rolling surface, your setup would give you a very even match... Other than that, I notice that you have been trying to raise the rear of the car. A profile change in the rear to a 50 or greater will help that. Will also get a little squirmy if pushed.

225/50-16:
_--sidewall (mm) = 112.5
_--diameter (mm) = 631.4
_--circumf. (mm) = 1983.6
245/45-16:
_--sidewall (mm) = 110.3
_--diameter (mm) = 626.9
_--circumf. (mm) = 1969.5
(0.71)% difference in circumference.

Cameron