215/45/17 is was came standard on the SVT focus on a 17"x 7" rim with a -47 offset. If your not running coilovers you might get by using a 225/45/17 using a SVT rim with slight sidewall inversion since the latter tire is a mm wider. I think the ideal rim with the latter tire would be a 17"x 7.5" with a -46, or -47 offset would be a good fit. With the focus bolt pattern I doubt any exist. If your driving 65MPH on a stock SVT wheel, & tire, running a 225/45/17 would read about 66MPH, where as running a 225/65/17 your speedo would read over 75 MPH. A
225/45/17 has a +.35" overall diameter to the 215/45/17.
I don't need training wheels.
(AWD,Traction control,Stability control,Launch assist,Autotrans,Paddle shifters). Got my driving skills driving front/rear wheel drive high performance cars on the street for the last 40 years.