Tire Size

[Tim O.]

Hi,

I picked up a set of 07-08 G35S mags to put on my 03 G35. Does anyone know what size tires I need to put on to keep within 3%. I'm going from 17x7x45 to 18x(7.5front-8.5rear)x45.

Thanks
Tim O.

[biggie]

OEM size wheels tires should have been:

17" wheels
Front: 17x7.5 +30mm offset
225/50/17

Rear: 17x8 +33mm offset
235/50/17


Go to a calculator, like this one:
http://www.venommotorsports.com/library ... ulator.asp

And plug in the old vs the new and you can find how much of a difference there will be.

Based on 18x7.5 and 18x8.5
Closest would be:
Front: 235/45/18
Rear: 245/45/18 or 255/40/18
About 1-2 MPH off from factory.

[Tim O.]

Thanks biggie,

I have the sedan aren't they +45?

Tim O.

[biggie]

Oh yeah I went with coupe specs since didn't know.