Looking to replace tires on my 13' G37S, whats the max tire width for the OEM wheels. Thanks for the help in advance gentlemen(and ladies)

 

Why not stick with what reccomended.
Highly doubt you'll get anymore performance out of a wider size vs a more sticky oem sized tire.

 

The 225/45&245/40 combo leaves a bit of room to go wider, I wouldn't go wider than a 245/40 in front on the 8.5" and a 265/35 would be the most I'd run on a 9", anything wider will be a pinch mount. IMO a 235/45 and 255/40 would be a nice width upgrade but not excessive.

 

I was able to run 245/40 and 275/35 on the sport wheels...never had issues. You do notice the additional stickiness but handling was on point.

 

Thanks for the advice, greatly appreciated! Looking to get new tires soon

 

Perfect, I had the rear at the same size as your recommendation just wasn't sure about the front; ordering tires this week. Thanks for the advice