Tire changing is cave man mechanics - not terribly difficult, but sensitive to good technique. And you need a few somewhat specialized tools which can be very simple/homemade or very elaborate, depending on your budget.
If you don't want to invest in the effort/tools to mount your own tires, removing the wheels and taking your mail-order tires and wheels into a cooperative shop is a good compromise. But not all shops are supportive of mounting tires they haven't sold. Some can be downright hostile, in fact.
If you want to tackle the entire job and do it without buying a tire changing machine (like the NoMar), this is the best tutorial I've run across:
http://www.clarity.net/adam/tire-changing.html
A lot of guys like the Harbor Freight setup, but I've tried it and thought it was mostly a piece of crap. I prefer my homebrew setup which is:
- a small Craftsman shop air compressor
- a junkyard 14" steel car wheel with split garden hose protecting the wheel from scratches and using a long threaded rod with wingnuts to mount it to my bench
- a homemade 2x4 bead breaker mounted on the wall
- 3x 16" MotionPro irons (highly recommended - good tire irons are key)
- 3x plastic rim protector strips
- Ru-Glyde mounting lubricant
- a Metzeler wheel balancing stand with appropriate adapters/weights.
Not including the air compressor, I invested maybe $150 initially to get setup, but I've probably changed a hundred tires and most of the shops in my area now get $40 or so per wheel to mount a tire you bring in (if they'll do it at all). So it adds up and it is always nice not to have to run back and forth to the shop.
All this being said, I've never enjoyed changing tires. As I said at the beginning, it's cave man mechanics and if you have a shop close by that will mount tires at a reasonable cost, I'd suggest you just use them and keep your hands clean.
- Mark