Recently I've noticed my Si has been pulling to the right when ever i drive on the highway, or anywhere for that matter. I decided to get all my tires balances (Winters and Summers) and also get an alignment. It turns out my current alignment wasn't that off. As i was driving back i noticed is still was pulling to the right. I tried the summer tires on and took it for a spin. The same thing! still pulls to the right!. So i tried driving my moms SI (Same year but a FA5) and it did the same thing! It happens for her car when you use her winter tires and summer tires (Each have different rims). I was reading previous forums about this but nobody ever came to a conclusion. About the best thing i found was because the transmission is on the left so one tire gets more pull than the other due to axial length. How many other people are experiencing this problem??? And what is the proper fix to this? or am i just going to have to get use to driving a car that pulls to the right?