Ok I am about to order some Volk GT-Ps....I was wondering what the best ratio is front and back...I was thinking 18.9 and 18.10 for the back.....They do not have half sizes in the GT-Ps....Can anyone let me know what is the best way...like do I need 18.9 and bigger than 18.10 in the back? Thanks for the help.

 

Everyone has a different idea of what the "best" ratio is..

The most common ratio everyone uses without rolling the fenders is 8.5 in front and 9.5 in the rear.

A few people also run 9.5 in front and 10.5 in the rear.. I think a few of them have to roll the fenders.. depending on the rim and offset of course. anymore than that and the tires definately stick out of the wheel well..

There was a recent Sport Compact Car article about getting 1.0G of handling and they decided the staggered sizes was having a detrimental effect on the handling so they managed to fit 9.5 all around.. Using that and basically sway bars they got the 1.0G

--mike

 

mike, what kind of wheels do you have? looks good from what i can make out in the sig

 

Optimal 18" fitment for the 350Z is as follows for the GT-P:

18x9" in front w/ +24 offset (2.78" polished lip)

18x10" in rear w/ +24 offset (3.18" polished lip)

This is directly from fitment we have done on a 350Z here locallly as well as Volk USA's recommendations.