Originally Posted by
trestlehed
That statement is absurd.
Perhaps in your experience, but what Oso Polar wrote very much aligns with my experience. Every 2-3 years when I need to get new inner tubes and/or tires for my 26" bike, I find smaller and smaller selection locally. Now I am often left with one model/size and the option to take-it-or-leave it.
700x38c on the other hand is an extremely popular tire size and the selection of tires in this size has just exploded in the last 3-4 years due to the rise of gravel biking.