Q - What size spacers should I fit to my standard / Rays wheels on my 350Z???
The usual size of spacers fitted to members cars 20mm on the front and 25mm on the rear. This creates no rubbing issues and the car can be lowered around 30mm with no issues with this size of spacer.
It is possible to fit 25mm on the front and 30mm on the rear. This might cause problems if you wish to lower the car though.
Members usually opt for Hubcentric spacers for ease of fit, they are no more difficult to fit than a wheel. There are other types available however they require changing out the wheel studs. This isn't a difficult job however it is more difficult to reverse and more time consuming.