I've scoured this forum and used the search but have been unable to find an answer. I have a 2009 G37xS sedan. The wheels are the stock 18" ones but what is the width?? 7.5 or 8.5? Also, what is the OEM tire size that came with these wheels?? Any help would be appreciated. Thanks!

 

Did you not check the owners manual? 18x7.5 with 225/50R18

 

The wheel width is stamped on the inner barrel of the wheel. Also, the tire size is stamped right on the side of every tire.

 

I haven't had the time to remove a wheel off the car to check what size it is. I thought it might be easier to ask. Also, the car did not come with stock tires. I am not sure if the dealer put the correct size on or just slapped any old thing that fit. The tires that are currently on right now are 245/45/18 and I've seen some places state that the the wheels are 18x8.5. I was hoping to find a definitive answer on this forum.

 

OEM wheels are 18x7.5 45mm offset wrapped in 225/50-18 rubber.