The MYTH Of Wider Tire Contact Patch Dispelled!

[RidingOnRailz]

Originally Posted by CapriRacer

So I assume you mean 1" of mercury - which is a lot!

That's 0.49 psi.

And lower barometric means higher PSIg, correct?

[CapriRacer]

Originally Posted by RidingOnRailz

And lower barometric means higher PSIg, correct?

Yes, you are measuring the same pressure against a lower pressure.

[RidingOnRailz]

Originally Posted by CapriRacer

So I assume you mean 1" of mercury -
which is a lot! That's 0.49 psi.

I put this table together, based on your information. Again, it might not be 100.0000% accurate, but underscores the points of our barometric pressure conversation. Did not include a mention in my table, but 'standard atmosphere' is commonly referred to as 29.92in(1013.2mil).

It reveals that the tire pressure per inch change of baro pressure is higher given given higher inflation pressures, which would seem correct to me. All in all, not nearly as significant a change compared with changes in ambient temperature.

[RidingOnRailz]

VINDICATED!!!

My initial points, proven at last! While the advice given from the below video was aimed toward off-roaders, some principles, regarding
contact patch are universal:

https://www.youtube.com/watch?v=spOUcaUzIHY

Please watch the entire video before impulsively commenting halfway through - "but, but...". I wish I could get Robert Pepper on here; his insights and knowledge are indispensable. The difference between contact patches from narrow high profile and wide low profile tires is 90% orientation, and 10% size difference.