sportmax wheels??

so i just bought some 002 sportmax wheels for my car and i got tires put on and was getting them mounted and the guy said that i need some kind of plastic insert(hub) to go into the middle of the wheel to fit right otherwise my wheel will move around where can i get these from??
thanks

contact sportmax? ive never heard of that but im not a huge wheel guy. Pics of the rims on the hubs?

im not big on wheels either so this is new to me no pics yet but thanks...
-pat

you can get hub centric rings at splparts.com. it also depends on what size centric ring the rims have as compared to ours...

i called sportmax the lady told me that i didnt need them, and it wouldnt be a problem unless i was driving at high speeds but i found out that i can get them (order them) from discount tire...so finally i can put them on.