Need a quick confirmation: I have a 2011 G37xs (AWD sport, Canadian) that runs 225/50R18 stock. I want to go down to 17s for winter and I'm looking at a set of 225/55R17 off a 2007 G35x.

Will these fit and clear the calliper? From what I can tell, the AWD sedan does not have larger callipers, correct?

 

I believe it should. I'm running that same size on my 2012 X Sedan. You are correct that the awd sedan doesn't get bigger brakes with the sport package.

 

Excellent, thanks! Any idea if the TMPS from the 07 G35x are compatible? Wondering if I'll get this lucky with this particular set.

 

I'm running 225/50/18's on my coupe as well for winters.

 

That I can't help you on unfortunately as I'm not running TPMS in my winters.