Nissan 370Z Forum - View Single Post

Ubetit · 10-03-2012, 09:22 PM

I have a roadster with the factory spare and the tire is indeed a 145/70/18 even though i have the sport package.

One concern I have though is putting the 18 inch spare on the rear. That can't be good for the diff unless they are the same overall diameter. With a flat on the rear of my S2000, which was also one inch undersized, the manual wanted you to swap a front wheel to the back, while putting the spare on the front. So the spare was probably not the same overall diameter.

10-03-2012, 09:22 PM	#2 (permalink)
Ubetit Track Member Join Date: May 2012 Location: Ohio Posts: 527 Drives: the women lazy Rep Power: 13	I have a roadster with the factory spare and the tire is indeed a 145/70/18 even though i have the sport package. One concern I have though is putting the 18 inch spare on the rear. That can't be good for the diff unless they are the same overall diameter. With a flat on the rear of my S2000, which was also one inch undersized, the manual wanted you to swap a front wheel to the back, while putting the spare on the front. So the spare was probably not the same overall diameter. Last edited by Ubetit; 10-03-2012 at 09:31 PM.