I'm having a heck for a time finalizing my martian order for 8.5 or 9.5 20in wheels. 8.5 I'm liking the 245/45 20 idea verses just a 255/40/ 20 or even 265/40 20 on the 9.5. The 8.5 I think it that config would give a little more cushion for the side and smaller width may make it feel peppier...