Iíve often seem comments on the advantages of 26 inch tires for touring. The claim is that, unlike 700c tires, 26 inch tires can be found in small shops (hardware stores) throughout the world. What I havenít seen is a discussion of what tubes to put in those tires. For high end cycling presta is clearly the standard but what about the rest of the world. If you toured in Thailand, Honduras, Botswana, etc would you be able to find presta tubes?
I donít see myself headed to any of these exotic destinations anytime soon (maybe someday) but Iím curious.