Okay...

I bought a set of RSL Mase Wheels the other day. I put them on my car and they ride great, but I am nervous about not having hubcentric rings on them and would like to get these so I can sleep without worrying.

I found out the the 18x7.5 RS Limited Mase wheels are a 73mm so I have the outside diameter. I just need to find out what the inside diameter is for the hub on my vehicle and I can place my order. Someone has to know...please let me know when you get a chance any information is helpful...thanks!