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When was the last time you checked your tire pressure?


Linas.P
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Most of the time I check it twice a month and if needed refill once a month, but obviously look around visually before every drive. As it happened I been on holidays for several weeks and were driving very little, so the last time I had the pressure check was probably 6 weeks ago when temperature was still negative.

Last few weeks cars was riding quite harshly and I was thinking that I might need to inspect the suspension before MOT... anyway today I check the pressure when refueling and realised why.. I normally run higher pressure 38/40psi (instead of 35/38). When I checked the pressure today it was 42/44psi! So obviously weather got warmer, but I never though it could increase the pressure so much - I though it is max like -1psi.

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Maybe once a month or so for myself. I always try and do it when the tyres are properly cold and use the airline that is less than a mile from my house, or place of work. Normally I will only put a couple of PSI in, if any.

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10 minutes ago, Ala Larj said:

Every time I drive it. I use the tpms on the dash. It's in bars rather than PSI but can go up .2 of a bar between cold and warm weather.

Presumably checking on the dash came with later cars?  Although mine has tpms I'm guessing it's there as a warning rather than a means of checking.

I've got a workshop at home so checking tyres is easy using my compressor.

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I check using the pressure display in the cluster every journey.

I recheck using a calibrated analogue dial gauge  should the dash show a significant change (but not OOS) reading.

Usually the only time I have had to adjust the pressure is when the weather changes markedly i.e. Autumn and Spring.

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  • 4 months later...

I do track days on my bike the tyre pressures have to be reduced by around 8psi frt and 10psi rear after checking after a few laps the increase is around 4-6 lbs psi it increases quite a way above possibly same with the cars in hot weather.

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22 minutes ago, MVrod said:

I do track days on my bike the tyre pressures have to be reduced by around 8psi frt and 10psi rear after checking after a few laps the increase is around 4-6 lbs psi it increases quite a way above possibly same with the cars in hot weather.

After we did nearly 2.5k miles on our road trip in May I was sure the tyres would need inflating but they were exactly where they were when we left!👍

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1 hour ago, The-Acre said:

After we did nearly 2.5k miles on our road trip in May I was sure the tyres would need inflating but they were exactly where they were when we left!👍

Actually if tyres are all sealed properly etc. I would not expect to loose any pressure whilst driving even for 2500miles or more, I would expect to loose pressure whilst car is parked for prolonged periods of time.

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1 hour ago, Linas.P said:

Actually if tyres are all sealed properly etc. I would not expect to loose any pressure whilst driving even for 2500miles or more, I would expect to loose pressure whilst car is parked for prolonged periods of time.

I don't know anything about the science behind it all, I suppose I expected some kind of change due to high speed on the autobahns, snow on mountain roads and 30 degrees on city roads but I guess it goes to show my rims are sealing well.  Actually that was May, and they still haven't needed inflating.

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Pressure changes due to temperature, altitude etc, that's why you set them when 'cold'. Just driving along sedately will see a 0.3 bar rise from heat generated by sidewall flex.

Note cold pressure is your local cold pressure - ie if your climate is 37 degrees you will have less air molecules in your tyre 'cold' than someone in a 15 degree climate showing same gauge pressure. Remember when your gauge shows zero there is 14.7psi at sea level already - so correct term is gauge pressure rather than just pressure.

So when it's cold ie winter you check tyre pressure and it's down, not because you have a leak. The air has less energy and therefore pushing on the inside of the tyre less. So more air in winter to achieve same pressure as summer.

 

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