Tyre pressure weirdness

[Mussels]

Does a pressure tester measure relative to air, if the atmospheric pressure goes up the relative difference goes down?
I wouldn't expect it to be enough to make a difference but if the cheap sensor cut design corners, possibly?

[The Spin Doctor]

But it is interesting from a perspective of those people who say they can feel the difference in 0.5 psi tyre pressure, I know I can't feel the difference 5 psi makes.

I can feel a difference of 2 psi or so in the front... but I'd never detect that difference at the rear.

[Mr. Dazzle]

Does a pressure tester measure relative to air, if the atmospheric pressure goes up the relative difference goes down?
I wouldn't expect it to be enough to make a difference but if the cheap sensor cut design corners, possibly?

Sir is talking about the difference between gauge and absolute pressure. As the name suggests, gauge pressure is what gauges generally read...namely, the difference between either side of the gauge, which is most cases is just one atmosphere less than the absolute pressure.

I suppose there would actually be a sort of delay in tyre pressure change relative to the outside world as the atmosphere warms up and cools down and the air in the tyre lags a bit.

1 or 2 psi would be alot for that sort of thing though.

[wull]

I did say it was weird, it probably is the guage, that would make more sense, it's not exactly a scientific instrument.

But it is interesting from a perspective of those people who say they can feel the difference in 0.5 psi tyre pressure, I know I can't feel the difference 5 psi makes.

I tend to find unless it’s the best racers at the absolute limit then they’re talking pish! The kind of regular Joe’s that say that wouldn’t know their fartbox from their elbow.

[Le_Fromage_Grande]

42 this morning

[Horse]

42 this morning

Happy birthday


Have you tried checking your car tyres at the same times as the bike's?

[A_morti]

I can't feel the difference 5 psi makes.

Was going to say - 5 psi seems to be about my "bum dyno" sensitivity on pressures. I would consider +/- 1 or 2 psi to be within margin for error, and leave it well enough alone.

[Tricky]

I rate this thread a 5 (+/- about 5.5 , dependant on which gauge I'm using )

[Le_Fromage_Grande]

42 this morning

Happy birthday

That's Sunday, and a bit more than 42

[Skub]

Don't let the pressure get to ya.

[A_morti]

That's Sunday, and a bit more than 42

Is it 43.5? Cos that sounds like free bar to me...

[Le_Fromage_Grande]

That's Sunday, and a bit more than 42

Is it 43.5? Cos that sounds like free bar to me...

That's weak

[Yorick]

That's Sunday, and a bit more than 42

Is it 43.5? Cos that sounds like free bar to me...

A free bar? Where?

[Horse]

A free bar? Where?

In your patio, being stained?

[MrLongbeard]

That's Sunday, and a bit more than 42

Is it 43.5? Cos that sounds like free bar to me...

A free bar? Where?

[Yorick]

Is it 43.5? Cos that sounds like free bar to me...

A free bar? Where?

It's not a joke if it has to explained. Still no idea

[Le_Fromage_Grande]

https://en.wikipedia.org/wiki/Bar_(unit ... 0meters%29.

[weeksy]

[A_morti]

It's not a joke if it has to explained. Still no idea

It was a maths joke. Or a physics joke if you squint at it a bit.
Yeh, I know...

[Mr. Dazzle]

It's not a joke if it has to explained. Still no idea

It was a maths joke. Or a physics joke if you squint at it a bit.
Yeh, I know...

I still tell people the "two cats sat on a roof....which one slides off first?" joke, which I think I got from you in about 1998