I purchased after market wheels for my 240sx 2 years ago. I had to replace the tie rod ends on the front suspension and the people who fixed it said that it had to do with the wheels. They were one inch bigger than the original ones, and were lighter...supposedly. Shortly after, I traded my 240 for my Z. I want to put after market wheels and tires on the Z but I'm afraid to until I understand why my wheels messed things up on the other car. Can anyone explain to me what I need to know in order to get the right thing for the Z? Thanks!!