i want to upgrade the current rims i have 17" zennetti and want to go with 18" any suggestions on the width and offset and tire size. my car is at stock ride height.

 

I suggest you do the suspension before you get 18"s, IMO a Max on 18"s not lowered looks hideous basically. I'd probably go with 18x8, which would make your best bet 235/40/18 for tires (I think... maybe 245/40/18 would be better) As for offset, 38mm I think would be best.