Did that Wednesday

Had to do that last night, I was on 21 on one (!).

Every winter this happens and every year I ignore it since Roger Goodell told me that the ideal gas law is a myth.

Definitely recommend keeping a tire pump in the car.

I bought an electric (120 VAC) pump about 20 years ago because all of the gas stations went to non-free air and most of the pumps didn't work anyways. $20 for an electric pump really works out well instead of putting in a bunch of quarters when the seasons change.

I've heard about the pumps that run off the cigarette lighter and that sounds like a great innovation because you can use it on the road or help someone else out if they just need enough air to get to the next exit.

I got my car lighter pump at CVS and used a 40% coupon. I have had it for about 5 years now and it's perfect. Never had a problem. I too got sick of having to drive to the gas stations where either the free pump doesn't work or having to deal with a bunch coins and a time limit. Pep Boys did/does give free air, but it's much more convenient having your own pump.

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When you drive your car and the tires warm up from friction, do you let air out?

I generally try to follow the manufacturer's recommendation on tire pressure cold. I assume that they factor in the increased pressure from friction and temperature increases throughout the day.

Nitrogen

Came here to say this. It sometimes costs money and sometimes it's hard to find but it's a huge tire saver.

Goodell is a clown.

I keep one of these in my car, and it has been running strong since 2017.

https://www.amazon.com/Viair-00088-88P-Portable-Compressor/dp/B005ASY23I

Ryobi has an eighteen volt tire inflater that uses their usual tool batteries. It's the cat's meow.

Belichick doesn’t pretend to be the “Mona Lisa Vito” of air pressure. One of his best pressers.

Need to replace that summer air with winter air

Oh no, less than a minute to fill up a car in the cold. Soft. You’re not from here

Nitrogen-filled tires still drop pressure as temps drop.

Not nearly as much. I’ve had my truck a year with nitrogen and they’ve only fluctuated 1-2 psi.

It’s true they don’t drop as much. They still drop enough to be significant. Nitrogen filled tires drop pressure by 1.9% for every 10F drop in temperature. A tire filled to 35PSI at 90F will be down almost 7PSI at the -10F temps we will see on Saturday. If you’ve only noticed a 1-2PSI change over temp, you’re either not driving it during wide temp fluctuations or are not paying attention.

It simply is true. It’s a 2022 vehicle and I leave the tire pressure up on display at all times.

My dad bought me one, and it’s so handy! The batteries last a while too.

Bill Nye is scratching his head wondering what the hell op is talking about

Ridgid makes a tire inflator too. It is pretty convenient to use. Set the pressure and pull the trigger. It shuts off automatically.

The air is 78% nitrogen. You're getting scammed lol.

Just be careful adding air when it’s this cold, the valve cores can get stuck open and leak.

78% of the air on Earth is nitrogen (and it is free and does not require any special filling station). Does the last 22% make that much more of a difference?

Ah. I see. Then your truck must exist in a realm that uses a different set of physics than the ones we use here.

Not to mention the fact that "normal" air is already mostly nitrogen anyway, so...this point is moot.

Sure are. I have a theory that car dealerships don't want more folks to start buying their own air pumps. Because....profit.

Just was talking about deflate gate on another sub.

Do more than check your pressures, check your sidewalls! If you have any severe dry rot or chunks of rubber taken out with interior chords showing, buy some new tires! Trust me you do not want to be stranded on a flat or blowout in the middle of a storm or snap freeze either.

Not to mention tire treads it's very easy to misinterpret how much stopping power, traction and control you have especially if you aren't well educated on cars. A lot of tires will start underperforming in wet and icy conditions even with 4/32 of tread left. A lot of tire places will charge you little to nothing to get a tire evaluation.

I have a bridge in Brooklyn for sale. Would you be interested in purchasing it?

Lol. I've done it for years and I've had some great results. 80k miles on a set of tires in New Hampshire. I also drive 100miles a day year round and never had to adjust the pressure once

PV = nRT

Yup, we learned that in chemistry class back in the 1970s.

depends, is it supported by nitrogen?

tire pressure specs are based on the cold pressure. so to answer your question... no.

Sure is!