Would the 245/40-18 tire lool good on this car with 06-08 se max rims? They come stock with 45 series i think

 

I think they would look good.....only thing just run a tire comparrison....and check how a lower profile tire would affect your speedometer......don't want to get any tickets. Here is a good site for that so you can compare how changing tire size will impact your speed:

http://www.1010tires.com/tiresizecalculator.asp

 

Thats what I've got on my 01 with the same rims.... With it lowered a little, it looks good and fills the wheelwell.... BUT.... less shoulder= stiffer ride..

 

Ideally to keep the speedometer correct etc our plus 1 tire size is 235/40/18, personally I'm running 225/40 but I wouldn't mind 235/40 or 225/45 but I think 245/40 is too wide for my taste especially on those rims but you can run it with no issues even if lowered.

 

See my sig those rims came with 225/45 front and 245/45 rear and I have 225/40 on them and they are the 350z wheels with a 30 offset and 8" wide which is wider then the max wheels your looking at and with a lower offset so they poke out more and running 245 would probably rub but with those max wheels you'll be fine.