I have a 2008 base model prius that currently has performance rims with low profile tires. Not so great for where I live. I want to put regular rims and tires on for a smoother, less expensive drive. I know that the touring model comes with 16" tires and the base model comes with 15". Since I would be replacing the rim/wheel with the tire, can I use 16's or do I have to stick with 15's?