So first gen Prii have a 4x100 bolt pattern. Also the track is much narrower. So I searched the inter web and found a 4x100 to 5 x 4.5 adapter that was 2" wide. This way I can run 5 lug steel wheels and maintain the proper track. As far as tire size and final drive I'm working on that. Not sure if it will hurt to run a little taller tire. We'll see.