i plan on getting the g37 akebono bbk for the fronts and rears. from what I have been reading, if you have stock 18s, you need spacers, but the rears are ok without spacers.


so what offset of the front wheels would I need to be looking for as I plan on going with 20s with 245/35/20 tires?

 

There is no magic number, as the wheel design can also influence if they will fit.
I would generally say a et35 would be fine, but there is no guarantee. Best bet is to try and find pictures of a Z running the wheels you are looking at.

I am running 20x9 et30.

My 18x9 et35 would not clear because of wheel/spoke design.