Spare Tire

[pineranch]

I'm looking for advice. I have 614's on the wheels. I made a decision to keep the Marathon on the spare. My reasoning is;
If I need to put the spare on, it is to get me to the next town ONLY. We have Good Sam's also.
I didn't see the need to put a $300 tire in a rack to weather out.
Anyone check the tire size of most automobile spares?
Where am I going wrong in my thinking.
Mike