Are all of you using the lug nuts that came w/the wheels? I was thinking about getting the McGard Spline Drive lug nuts, however I don't know if it will fit or not. What's that extra black plastic piece that looks kinda like a wheel spacer? What size & brand is everybody using?...I'm leaning towards the S-03's (I just need tires for the dry land/season). I remember someone here changed out the center caps...More info on that??? Thanks!

 

I'm using the black lugs that came with the wheels.
If I'm thinking of the same black plastic piece that you are referring to, it's for removing the center cap.
I use Toyo Proxes T1S 225/40/18 in the front and 255/35/18 rear.

 

I am using BF Goodrich G-force T/A KD 225/40 18 and 265/35 18...

What tire pressure are you guys running?

 

Plastic piece is for the center caps(check your caps periodically! They come loose.) I run with Toyo Proxies 225/40/18 front and 255/35/18 rear. Tire pressure is 34 front/36 rear. I also use the lug nuts that came with them.