I will repeat what someone said about having a spare WITH PROPER PRESSURE.
I have carried a 12 volt compressor for many years. I have used it for helping other people many more times than I have used it on my TT or truck. Last summer while in Glacier NP, my camping neighbor was using a bicycle tire pump to fill his spare when he woke up in the morning to a flat TT tire. I thought he was going to hug and kiss me when I pulled out my Viair compressor. Before I left him, I gave him my old cheapie compressor that I picked up at a garage sale for $5.
It is beyond belief that people will pull a trailer of any type without knowing if their tow vehicle jack and lug wrench will work on their trailer.