[MLJJ]

Strangely enough, at about 2K miles all four tires (19" P0s ) have started losing about 2psi per week. I wonder if they haven't seated properly. I haven't had this issue previously. My driving habits haven't changed and the ambient temperature has not been substantially lower. Thoughts?

 

[GTS18BGTS]

Maybe it has something to do with the Earth's magnetic field weakening. ? Just kidding, maybe lol My car is showing 3psi lower per tire the past week and it's been in the 80s here. Tires have about 1100 miles in them.

 

[antennahead]

Temps and humidity dropped here by about 8 to 10 degrees this week, and my TPMS cold temps have dropped 1 degree in the daytime and sometimes 2 degrees at night.

 

[jimmuller]

Tom Brady has been letting air out of them. At least that's what ESPN is reporting.

 

[718S]

I’m no expert but I cant imagine they have a seating issue all of a sudden. I doubt you have 4 identical slow leaks... but 2 psi/week seems like a lot honestly. Puzzled. You sure the wife/kids aren’t messing with you? ?

 

[GregW]

If they are new tyres (or newly filled) the oxygen (21% of normal air) will slowly perfuse through the rubber (rate varies with the partial pressure of O2) until what's left is largely nitrogen--which perfuses MUCH slower than oxygen.

 

[JazzCatGab]

I noticed the exact same thing in my P Zeroes about a week before going to my HPDE Sept. 6-8. I topped them off the 28 psi for the 18" and before I went to the track on Saturday morning, I checked before leaving the hotel and they were 26 psi again. They soon were back to 28 psi after I got on the road to the track, but seemed a bit weird at the time. Is it just me, or do I hear the theme music to "The Twilight Zone" in my head?