My Focus now turned 100k not to long ago. I have not ran at all this year, damn kids. But the prior 3 years I ran it pretty religiously between 3 scca clubs (almost every weekend). I have never needed to tow, work on, or second guess the Focus while running it around the cones. We have even 2 drivered it a few times last season.
I can't encourage this enough. Please purchase a set of rims/tires to designate for autoX use. I'm pissed I didn't listen to this advice earlier. Your tires are fine for one or 2 events, but after 4 or 5 the tires are most likely no longer safe to drive on the road.
2001 Ford Focus ZX3 . 5speed . 105k+ . www.scca.com