[mdai245]

Im thinking about doing some HPDE with my new apex ec7 wheels using a square setup. I have narrowed down my tire size selection to:

235/45 18
245/40 18
255/40 18

255/40 is the closest to OEM rolling diameter and has more grip but weighs more and the extra grip might not be needed with awd. Its also max wide for 8.5 width wheel which may cause sidewall flex in corners.

245/40 seems very common size for track tires and a near perfect fit for the wheel but its heavier than 235 and odometer will incur 1% more milage due to smaller rolling diameter.

235/45 is the lightest, will offer the most sidewall protecrion from potholes, and will read 1% less milage due to larger rolling diameter.

I would want to go with 235/45 but tire selection is limited and im not sure if 235 is wide enough for track duty or it would provide good handling characteristics with its taller side wall.

What do you guys think?