Originally Posted by
corvuscorvax
Riiight. Ask yourself this: would you bet your safety on it? A disabled bike on a multi-day offroad tour could turn a reasonable day into a very serious problem: deyhdration, hypothermia...
Carry two spare tubes and a patch kit. If you flat, swap one of your spares in, and save the punctured tube to patch in camp that evening, which then rotates back in as a spare. The second tube is there as a backup in case you double-flat.
How about a spare wheel just in case you taco your rim or your hub bearings seize? Maybe a spare bike... Okay, I'm being facetious. But still, I don't think stopping to use a patch kit is life threatening. And certainly, one spare tube ought to do the trick.