wheel speacers
 

installed tein s tech on my Z with sport package
Goin to install Wheel Spacer.
What Size speacer should i get?

Depends on how aggresive you want to be. I am running 15mm in front and 20mm in the back. Others here are running 20-25mm on all four corners. It's really up to you.

AZ

I also have tein s-techs and have 20mm all around, but in retrospect I should've went with 25mm in the rear. Either 20 or 25 is fine.

15/20mm front/rear is a popular spacer combination on stock wheels and rubber.

If you want to be more aggressive 20/25 would work but I wouldn't go any larger than that.

right now my setup is reverse to wat you guys have, 20mm front/15mm rear (stock sus).

reason being, the front sport 19's offset is much more conservative vs the rear and could use more help. i was worried i would get tramlining, but not much different than stock... i was pleasantly surprised. :p