What did you do in your garage today..?

Small tires equals small air volume equals small leaks quickly becoming big changes in pressure. Vespa tire is something like 25-50% of the volume of a car/truck tire. Same leak changes the pressure at two to four times the speed.
That’s the only difference - the relationship between a leak and pressure loss is related to tire volume.

The relationship between pressure and temp is not.
 
That’s the only difference - the relationship between a leak and pressure loss is related to tire volume.

The relationship between pressure and temp is not.

So what was it that I wrote that you disagreed with exactly?

Being so tiny, vespa tires are way more sensitive to temperatures cooling when it comes to losing pressure.

Seems like GreyGhost said pretty much what I did, only he quantified what I qualified?

Small tires equals small air volume equals small leaks quickly becoming big changes in pressure. Vespa tire is something like 25-50% of the volume of a car/truck tire. Same leak changes the pressure at two to four times the speed.

Looks to me like you disagreed with what I said, while agreeing with GG saying the same thing as me lol
 
So what was it that I wrote that you disagreed with exactly?



Seems like GreyGhost said pretty much what I did, only he quantified what I qualified?



Looks to me like you disagreed with what I said, while agreeing with GG saying the same thing as me lol
Not really.

You said “Being so tiny, vespa tires are way more sensitive to temperatures cooling when it comes to losing pressure.”

I disagree with this. All tires change the same pressure as temps fluctuate, approx .5psi for every 5C change.

If your tires are leaky, that’s a different ball game all together. A leak of 100cc per day will most certainly impact a small tire faster than a big one. That has almost nothing to do with temp changes.
 
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Not really.

You said “Being so tiny, vespa tires are way more sensitive to temperatures cooling when it comes to losing pressure.”

I disagree with this. All tires change the same pressure as temps fluctuate, approx .5psi for every 5C change.

If your tires are leaky, that’s a different ball game all together. A leak of 100cc per day will most certainly impact a small tire faster than a big one. That has almost nothing to do with temp changes.

Right... but why are you stopping there like everything else is equal? Keep going with it. Walk with me here lol

Bigger tires generally = bigger PSI
Smaller tires generally = smaller PSI

Tire psi specs on my F150 are over 50% more than on my Vespa's front tire spec.

So if both vehicles have lost 3 psi over the past few weeks as temperatures cool, you're going to feel that more on the smaller tire, because proportionately, it IS more.

Because 3 out of 26 psi is more than 3 out of 40. And when you lose 3 psi in the truck, or a bigger motorcycle, it still probably has psi in the 30s, but when you lose 3 psi in the Vespa, it only has 23 psi in the front wheel and the small tires handles like a drunken donkey at 23 psi. So like I said, Vespa tires are way more sensitive to temperatures cooling when it comes to losing pressure...
 
Have had two bikes for a while now. Didn't really intend to, but selling one of them has been a low priority, and sometimes it is handy to have a "spare".

Struck out on both of them today though. TL1000S rear tire is totally flat, and 919 wouldn't start (suspicious of the tiny battery... again). At least the puncture is in the middle of the tread.
 
Have had two bikes for a while now. Didn't really intend to, but selling one of them has been a low priority, and sometimes it is handy to have a "spare".

Struck out on both of them today though. TL1000S rear tire is totally flat, and 919 wouldn't start (suspicious of the tiny battery... again). At least the puncture is in the middle of the tread.

Wouldn't have been an issue if you had a third bike.

Or a fourth...

Not puttin' ideas in yer head or anything... Just sayin'... 🤷‍♂️
 
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