I have 4 2" spacers that I bought off of ebay. I have mounted 4 4th gen SS rims on my 92 z. These spacers dont have the little hub centric lip on them. How do they center themselves? All wheels have been balanced. BTW do I have the right spacers for these wheels? I believe their dimensions are 17x9 inches. I finally got fed up with them and put the stock wheels back and have perfect balance. What am I doing wrong and what is the difference between the spacers I have and ones that hawks sells with the lip on them?