I have an 03 350Z and just bought new wheels. My car is at stock height and is like to keep everything functional as far as Slip and all sensors. My new wheels are

18x9 Front
18x10 Rear

I'd like the widest I can go on the rear while staying in stock specs and full functionality. I was going to go w/ 255/45/18 fronts. What should I shoot for backs?

 

255/40-18 is your proper front tire size , and 275/40-18 is your proper rear tire size.

 

The number of possible combinations staggers the human mind.

 

Told ya david dont doubt me again bish!

 

These tires questions are insane!

 

This thread is your bible, read it, learn it.

https://my350z.com/forum/2003-2009-n...questions.html

Your question would have been answered here:

https://my350z.com/forum/2487452-post8.html