Originally Posted by
StanSeven
OK. So you have a flat but can't see where it occurred - how do you find the source without using part of a cartridge?
I just check the inside of the tire and stick in my spare tube. Before putting my spare tube in my tire I inflate it with my mouth enough to give it some shape.
Incidentally, I'm writing this from home so, obviously, I've always found a way to get back.