Unless you are going to be traveling long distances, you don't need a spare, since you hardly ever need them today. The spare on my 1997 & 2004 have never hit the ground. I have a 1979 truck that never had a spare, and never needed one. If you have good tires, the chances of needing a spare are quite remote today. This is why many of the cars of the last decade have had the "donut" spare. I can't even remember the last time that I had a flat tire, it has been so long ago.
On a side note, one of the requirements of the PCS judging is having a spare. I remember back in the day, that we never even carried a spare on the ambulance, and some didn't even have a convenient place for the spare. On my Pinner, the spare went behind the seat, as in my 1969 Miller Meteor. Unlike the MM, the spare in the Pinner took up so much room, that you have to have the seat pulled up to the point, where even a short person is uncomfortable driving it. When I got the car, the spare was located in the rear patient compartment, stood up in front of the cabinet. It was the original from 1963, and had never been used. I was told that it was kept in the fire station, and when the car was sold, they put it inside the car just to get rid of it. Tires today are a lot more reliable than they were 40 years ago.
Paul