Tire Pressure-Altitude v/s Temperature??

[Don Bradner]

OK, all makes sense, but I wonder about this:

I run tire pressure monitors that can show me the pressure under way. Not
uncommonly, tires inflated to 100psi at 70 degrees will show running pressures
of 120psi. if that is entirely due to temperature rise, the temps would have to
go up 20%, is that true? That would be from 294 degrees K to 353 degrees K, or
176 degrees F. Is it possible that the interior of my tires get that hot, or is
something else at work?

The tires on my toad typically increase only 10%, from 33 to 36ps, which would
correspond to running temps of 122 degrees F.


Don Bradner
90 PT40 "Blue Thunder"
Eureka, CA