The tires on my Porsche 912 were not worn out, but they were more than 16 years old, so I decided to replace them. I didn't just drive up to a tire store and ask them to cheat me; instead, I shopped carefully for the tires, bought exactly the type I wanted, had them delivered to me, and installed them myself. I've done this a few times, and it works out well.
Photo album created with Web Album Generator