My philosophy about not having a spare on board is like getting dressed and not putting on pants. Might be ok around the house but anywhere else, not so good.
I have a spare on mine and if I could not physically change it, still would be cheaper than having a road service to a tire change off and on a rim in the boonies. A mounted spare makes life easier and much less expensive because, it's not if you get a flat, it's when you get a flat.
Happens to everyone sometime and the difference between being prepared and caught with no pants on can be appreciable, money wise.
Ponder that.
