[billyboy15]

Tires do not lose air because it’s cold tires lose pressure when it’s cold because the air contracts. It is possible that if the temperature goes down enough that the lowering air pressure can make the bead around the tire a little leaky and in that sense it could but it would need to be very very very cold for that to happen.

[Fishtalk]

I think you are right Billyboy.

These tires DO lose air as two of them went totally flat once the air turned cold. All summer and fall this tire works fine (all of them do) but come one cold spell, boom. it loses air and if I do not fill it will eventually go flat.

yeah, something about the bead and yes, it is very, very cold here....around 9 degrees...high maybe 19.

I am, one by one, replacing these tires.

[ROCKLOBSTER]

It is possible that if the temperature goes down enough that the lowering air pressure can make the bead around the tire a little leaky and in that sense it could

That's what I said.

...but it would need to be very very very cold for that to happen.

Yeah...and?

There's a product known as "bead sealant" used in the mounting of a tubeless tire. I'm sure it has it's temperature/resiliency limitations.