what do you guys think the best sidewall would be for a tire? 40 or 35? im planning on purchasing 18's. i know that the stock sidewall is 45. and i already think the sidewall is too big.. what are your guys' suggestions? thanks!

 

the stock tire size for the factory 18's are 225/40-18

 

40. 35 would be undersized. Want a 35 sidewall, go with 19's