Does anyone know what size I need? I know the hub is 66.1, but what about the other?? Thanks in advance!!

 

You should call Axis and ask them what the center bore size is on the wheel you have. They should have the center bore size. Most standard wheels that are massed produced to fit different vehicles (wheels not built to vehicle spec) have a center bore of 73mm. Again, because we don't know if your specific wheel was built for 350Z's (and most likely not), you should make sure what the exact center bore size is. I know this doesn't answer your question but it'll help you get it.

 

Or just call/go to a tire shop like Discount, etc... They can do the legwork for you, and order it in for you as well.