I am about to order a set of Rota P45R 18x9.5 +20 offset. They come with two different hub bore sizes 67.x mm and 73.x mm (can't remember the decimal point). What is the difference between the two besides size? is there any advantages/disadvantages between the two? I am basically trying to figure out why they would offer them in two different sizes. I believe stock it is 66.x mm.

 

the larger bore would not center perfectly and may require a hub centric ring to avoid "wobbles"

 

The 350Z hub bore is 66.1

I would recommend the wheel with a 73mm hub bore. With this wheel you can run a hub centric ring (73 > 66.1) and make the wheel hub centric. The reason they offer two different hub bores is because the 67.1 model is meant specifically for the Lancer Evolution and the 73 hub bore is meant as a generic fit for all other vehicles. The 67.1 model will technically work on the 350Z however it will never be hub centric as you physically can't fit a hub ring between the wheel/hub.

 

Different hub bore for different vehicles. Same bolt pattern - different bore. This way the manufacture can offer the same wheel for different vehicles.

 

So the 73mm hub bore it is. Which hub centric ring will I need?

 

73mm to 66.1mm obviously