Is fine if i put 20x9 front 20x10.5 rear on my g37x

 

Definitely not the correct place for this thread

But yes, to answer your question is is just fine. You just need your total diameter/rolling % within 3% with your tire sizing. Use a wheel/tire calc such as willtheyfit.com

 

Welcome to the site Ronny, please browse the site and select the proper folder. Moved to the wheel folder for specific replies.
Having AWD makes wheel/tire selection more critical. Here's a post I put up that shows the best tire combos, you then select the proper wheel width and offset so you can run one of those sets.
https://www.myg37.com/forums/brakes-...ml#post3992771