Then it's going to be "who has the best nitrogen".I see a whole new set of memes coming. It used to be "What oil do you run?" or "What's the best tire?" 2021 has brought us "Air or nitrogen?"
Then it's going to be "who has the best nitrogen".I see a whole new set of memes coming. It used to be "What oil do you run?" or "What's the best tire?" 2021 has brought us "Air or nitrogen?"
You are correct that the water does evaporate without boiling. This is water dissolving in the air, not a phase change. The amount of evaporation is determined by the saturation pressure of the water in air, which does vary by temperature. But the variance is pretty small over the temperature range a tire experiences. From 50 F to 150 F, the saturation pressure of water in air increases by about 3.5 psi. So, you would expect maybe a 3 or 4 psi change due to the water when there is some liquid water in the tire as the tire heats up. This is nothing like the pressure increase due to a phase change when the water turns to steam. But It certainly does add to the pressure variation compared to a dry fill.Not true, water can change state from liquid to vapor well below boiling temperatures via evaporation. If you don’t believe it explain how puddles evaporate? There would never be any humidity below boiling in that case as well.
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You are, of course correct. There is liquid water and water vapor. My use of the word dissolved is just plain wrong. But the amount of water that transitions from liquid to vapor is small, and the 3 to 4 psi is what you would expect. (Saturation pressure is real, not made up like my new matter state )Water dissolving in air? If it’s no longer a liquid then it’s a vapor/gas, that’s by definition a phase change. If there’s a physical state in between, then you have discovered a new physical state of matter! Let the Nobel committee know immediately!
physical states of matter
Three States of Matter | Introduction to Chemistry
courses.lumenlearning.com
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No beans in Texas Chili so, probably not in a gaseous state.Now I don't know what state I'm in.
That additional few PSI will be in addition to the normal increase in pressure due to temperature. The tire ends up with higher warm pressure that predicted by simple thermal expansion. Doesn’t make much difference for us street riders, but for road racing, where they are right on the edge, splitting PSIs to get a fraction or a second better lap time, it’s significant.You are, of course correct. There is liquid water and water vapor. My use of the word dissolved is just plain wrong. But the amount of water that transitions from liquid to vapor is small, and the 3 to 4 psi is what you would expect. (Saturation pressure is real, not made up like my new matter state )
Good thing I'm not from Texas then.No beans in Texas Chili so, . . . .
Still gonna stick with plain ol' easy to find anywhere air.
So, how do we genuinely take advantage of free nitrogen at Costco? I'm currently running old-fashion breathing air in my tires, and I want to switch over to nitrogen. Do I go to Costco, open my tire valves, try to squeeze out all the old air, then refill with nitrogen? I know I'm being stupid here on purpose. But really, how does the average guy make use of Costco nitrogen when he already has air in his tires. Do motorcycle shops that mount new tires filled with nitrogen help get you started? Do I always top-off with nitrogen and, little by little, replace the air in my tires? Asking for a friend...
Absolutely!! 32psi front and 36psi rear with good old 78% Nitrogen has served me well for over 45 years on my street bikes.Nitrogen in tires = overkill
A 30 minute long wait in out of control Cotsco crowds for free air or to save 2 cents a gallon on gas is just not worth it to me. In fact going to Costco for anything is no better than Walmart. Both places are very last resort shopping.If it is free why not?