i have an 07 G35 with the suspension package. right now i am running 19's all around. looking at Tire Rack their only set ups are for 19" wheels.

idk if there are any complications but can i run a 17" or 18" set up? i want to be as cost efficient as possible.

what sizes are possible?

 

Search!!

You can do 17" wheels or 18" wheels. I am using 18". My rear tire is not wider either.

Use 225/50R17 or 225/45R18 on the front (smaller rim = more rubber = better in severe winter)
Use 225/55R17 or 225/50R18 on the rear

Also use http://www.miata.net/garage/tirecalc.html to make sure that the tire sizes you go with do not vary more than +/- 5%.

Select the tires first and then the rims. Don't buy rims that cannot support your tires, i.e. too wide of a tire with narrow rims.

If you have a 35x then be certain to match all 4 tires.

https://g35driver.com/forums/media-share-g35-coupe-v35/188382-my-winter-setup.html