According to: http://www.newscionxb.com/133-wheels-tires/3887-eddnogs-xb-2-0-wheel-tire-chart.html
225/45/17 is VERY close to "stock" overall/rolling size. That keeps the speedo, odometer, and the ECU all working like they are supposed to.
The width fits fine w/ the right offset range. I'm running 225/50/16 (SAME tread width and stock overall diameter as 25/50/17) on 7 inch wide rims. They are 38 offset and work perfectly. For 7.5 or 8 inch wide, go w/ closer to 35 or so and will all fit whatever your spring drop.