People will pick the tiniest things to be "frugal" about.

Rema patch kits are already really cheap. That little tube of vulcanizing fluid can take care of over a dozen patch jobs if you're smart about it -- the key is to save up your punctured tubes at home, and the next time you need to patch a tube on the road, do that one, and then do the rest of your tubes when you get home before the fluid gels up. If you want to go big, Rema sells bulk quantities of patches.