Hey guys

I'd like to know whats the widest tire size I can go with on the stock 2009 18" G37 Sedan rims. Thanks in advance!!

 

Do you have the 7.5/8.5" staggered set? If so a 235/45/18 would be the widest in front for a standard mount and a 255/45/18 would be the widest in back for a standard mount. If you go wider it's considered a pinch mount and this can cause excess sidewall roll when cornering, not an ideal situation.
Welcome to the site BTW.

 

I have these

 

Lucky you, those are the nicest looking OEM sedan wheels IMO. Those are 7.5/8.5 staggered setup, so my previous reply is what I'd go with.
Brad

 

really? i didnt know they are staggered....

 

Unless they were individually purchased as a square setup they should be a staggered set, are your tires the same size front & back, if so a quick measure of the rim width should clear that up.

 

yeah looks like mine arent staggered i have the same tire size all around. 225/50/18

 

I'd still measure the wheel width, previous owner may have just bought all the same size tires