I carry one, because I want to deal with the situation at the site where it occurs. It is quite possible to drive all day and get to a camping spot in a semi remote location and awake the next AM with a flat tire. I am trying to avoid the need to carry an spare wheel/tire. I also want to avoid having to call road side service that might be who knows how far away. A portable compressor like I posted is neither big, expensive, or heavy. It has a lot of other uses besides besides flat tires. I have used mine twice to fill campground neighbors' tires, but not my own. However I have topped up bicycle tires many times. No offense, but to me its a no-brainer.
Even if you buy a much more expensive one than mine, it is still less than a spare wheel and tire and a lot less work. I also don't carry all the tire changing tools.
Ken
P.S. I have a TPMS so I can catch pressure problems before they become severe.
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