Winter tires bleed air...anybody else

Winter tires bleed air...anybody else

I’m running Pirelli Scorpion 275 45 r20 on Tesla Sportline Rims.

At anything above about 35° I don’t have any problems.

As soon as the temperature gets below that they start to lose air like crazy. For example I will fill them up to 40 PSI and then a day later many of them are too low and one was as low as 26 PSI!

Obviously not optimal for going up to the ski hill.

Firestone has looked at them but the tires never leaked when they were at the shop.

Anybody got any ideas? | January 14, 2020

Maybe hard to find someone with those specific tires and rims and in freezing weather. You might contact Sportline to see if they know anything unusual about their rims. Sounds like all four tires have the issue, so it's either a design problem with the tires or the rims or the combination. Sorry, that's not very helpful.

ElectricSteve | February 9, 2020

Are these the first tires on these rims or had these rims have other tires mounted on them in the past?

stuart | February 25, 2020

Was it much warmer when you filled them to 40 and then down to 35F when the low pressure was indicated? Cold weather causes the pressure to drop. Always has. No one ever noticed it before tire pressure warning systems. My garage is warmed to 50F. I fill my tires at that temperature and then drive outside where the temp is in the 20s and I get tire pressure warnings. Pressure is back up when the tires are warm.

If you tire pressure does not come back up as the air temperature increases then you my have a problem. If it does then the temporary solution is to fill your tires when it is cold, but they will be overpressure when it is warm outside.