I do the 4 tire rotation and always seem to get the max life out of these gold plated tires......
The spare on my 98 F150 is still the original, same for my Mrs, 06 Rav 4.
Now that I think about it, the spare on my 49 is the original size (600x16), I guess a spare is a "set it and forget it" to me grin

re. flats, I haven't had a flat in quite awhile but I had a wheel to start to break apart on the 49 last summer when out on a nice cruise. That spare got me home safe and sound evn though it was shorter than the 225-R75-16's I run....