Every time I go north to a cold climate the light comes on for low tire pressure.

All due respect, but you have this backwards. O2 molecules are smaller than nitrogen molecules. Which is 1/2 the reason it’s used to inflate aircraft tires.

shrinkage is real

It doesn’t matter if storms come or go, you should always check your tire pressure every month when the tires are cold. You can also check your tire pressure when driving using your cars computer but if you have been driving for a while, they will show up to 4 or 5 pounds more pressure.

A ballpark estimate is that you will lose about 1 PSI for each 10F drop in ambient temperature. You should check when the car has been sitting for some time, say in the morning. If you travel from an area where the overnight temperatures are typically 80F to an area where they are typically 30F then you may see about a 5 PSI drop. This may very well trigger the TPMS.

Not correct! Nitrogen molecules are slightly (3%) larger (more volume) than air.

True. If you check your tires regularly it doesn't really matter if you fill them with nitrogen or just plain everyday air.

Nitrogen has qualities that makes it overall better for tire inflation. However those qualities, as compared to straight air, are pretty minuscule when talking about the average joe tooling on down the freeway. They become significant, however, when the tires under consideration are on race cars, semi truck fleets, commercial and military aircraft, and the like. I think NASA used nitrogen in the space shuttle tires though I don't know that for sure.

Major positive qualities for Nitrogen is that is inert: it does not support combustion or corrosion. Nitrogen is also more stable in extreme temperature fluctuations meaning that there is less variation in pressure when going from very warm to very cold. It is also less likely to leak, all other things considered, than is air, because the nitrogen molecule is a bit larger than oxygen. But nitrogen is expensive ($5 per car tire??). The overall advantages of nitrogen, should should you be driving in the Indianapolis 500 or landing a 747, are important, but I doubt it makes very little if any difference, considering the price, if the vehicle you're piloting is a Toyota Corolla.

Check out "The Pros and Cons of Nitrogen Tire Inflation" by Tsukasa Azuma, updated February 22, 2024.

I use a 78% nitrogen mix exclusively. Tires work just fine.

"But I was in the pool"

What pressure is right for Yamaha Golf Carts?

Judging from what I’ve seen , ALL of them! Including golf carts ! :):):)

You don't need Nitrogen for your tires. Just remember on Oct. 1st replace the summer air in your tires with winter air.

Hurricane pressure
 

I felt it in my sinuses.

When I first got here I had back problems so I reduced tire pressure to 18 to 20 on 10 inch 205 tires so cushioned my back when going over street drains. In 2 years wore out rear tires due more weight on rear. The front had even wear.

For me 25 Psi for rear (more weight in rear) and 22 for front 10” 205s works for me. Back tires are newer than front so I only rotate side to side till back tire catch up.

So, where do get air with no nitrogen? :pepper2: