A single tire change can take anywhere from fifteen minutes to a couple of hours, depending on how busy the shop is and how knowledgeable the mechanic is. Your best bet is to call the store and ask how long the service would take.
No you do not, the computer will take care of that as long as you don't go real big with the tires.
Depends on what you're working with, and how experienced the person changing the tire is. Someone proficient can change a 22.5 or 24.5 in a half hour or less... the smaller 19.5s and 17.5s are a bit more challenging.
Take it to a garage
6 mins 37 secs for men 2 days and 19 secs for a women
The length of time to change a spare tire can vary depending on the tools one has available and the amount of experience they have in changing tires. If AAA came and changed a tire, it would take them about 15 minutes once they arrived. For a non-professional, it would likely take anywhere from 30 minutes up to an hour or two (again, depending on the equipment available).
one year
10 minutes if the replacement is already mounted on a rim (which is not the norm). About 40 - 45 when removing the old tire and mounting the new one to the rim. For someone not experienced with this, it'll take significantly longer.
You can but it is not necessary.
Hold the valve stem until enough air has gotten out of the tire.
tire
Bruce, Take a tape measure and go around your tire that will give you your inches although you tire should say on it.