I just got some rota d2's 18x9 with +30 offset do i need the hub thing? Because i didnt get it with the rims, nor i didnt get the lugs nuts what kind can i use? and where can i get both things. Thanks

 

You mean hub centric rings? Can get them at discount. Im not running them, and I dont have any type of shimmy at all on my advan RS's.

As far as lug nuts, any acorn style lug nuts should work. Dont reuse your stockers. Not sure on those rota's, but most aftermarket rims use the acorn (tuner) style.