Any 5 lug OEM 18" Infiniti wheels that came on a model with the Large Sport calipers should clear your calipers. This includes the older G37 S that came with sport calipers wheels as well.

 

I'm not entirely sure this is true. Do not quote me though

I was in the same boat and after a lot of digging there were only 2 wheels that were confirmed to fit. It goes beyond just the width and offset. You need a specific backspacing also.

Enkei Raijin 18x8.5 et35 fit with a 225/50 tire. I can't remember the other set of Enkei that I saw

I got sick of guessing and checking and just bought snow tires for the oem 19's.

 

Thanks for the reply so something like this should fit?

G37 Sport and G37x Sport
Front: 18"x7.5". Cast aluminum-alloy. Bolt pattern 5x114.3 Offset +45
Rear: 18"x8.5". Cast aluminum-alloy. Bolt pattern 5x114.3 Offset +50

Reference:
https://www.myg37.com/forums/wheels...eels-and-tires/191169-g37-oem-wheel-and-tires-specifications-for-reference.html

and if I'm looking for a square setup, I would need 18x8.5 et50?

 

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