19" vs. 18" Wheels/Tires

[DenverSteve]

Thanks Johnny. Post 18 is what I was hoping for. I can easily "chart" the difference in height and width on any tire converter. That doesn't give me the Boxster application I need. Both this and my first Boxster have always run factory wheels and tires. It's a little different than changing out the 32's on my Wrangler.