My car has a digital readout of air pressures, and an alarm when pressures are low. Last night, while addressing a low tire, I was diligently re-filling all my tires to 30 psi as recommended by the manufacturer. While filling one of my tires however, the pressure didn’t seem to be increasing - I chalked this up to air escaping while filling the tire, because the gas station’s air nozzle provided a very poor seal. I know it takes a couple seconds for the pressure indication to update, so I waited 5-10 seconds in between readings. Still, while I was trying to get it to change from 28 psi, it suddenly jumped to 57 psi. I immediately started letting air back out, and it took a while to get back down to 30 (a minute or so).
So, question is - am I in dire need of tire replacement, or is it more of a peace-of-mind sort of deal? I read somewhere that the burst pressure for most tires is 200 psi, but I don’t know if that takes into account long-term wear or separation of the metal shoulder from the rubber. Now I’m paranoid about a catastrophic rupture on the freeway. The tires aren’t very old, certainly less than a year, maybe 12k miles on them. I’m just not sure if I need to take time off work and get them replaced immediately or if I can wait 5-6k miles for my next car maintenance.
Thanks in advance to anyone who knows!