I'm looking at KMC Venoms 18X8.5 with 235/40/R18s for tires. Now I know I will be resting on fenders all aired out (I'm on them a little with the current 15X7 with 205/60/R15s) as these wheels will be roughly .7" larger in diameter than my stock wheels. I am more worried about the rims clearing the tie rod ends, sway bar links or any other part of the suspension. I've been told to go with 4.5" backspacing on both front and rear. If anyone has any thoughts or comments that would be helpful.