burkale

Got a flat the other day and the donut nor the "temp mobility kit" were in my car. So, I'm going to buy a donut, jack and lug wrench instead of paying $200+ for a mechanism that basically patches and re-inflates a tire. I don't know what size donut I would need though. The normal tire size on my car is 225/50/17. Any help would be appreciated. Thanks, Alex