View Single Post
Old 02-16-2020, 07:22 AM   #4
CapriRacer
AF Enthusiast
 
Join Date: May 2003
Location: Somewhere in the US
Posts: 504
Thanks: 0
Thanked 34 Times in 32 Posts
Re: Rim/Wheel Material Effect on Tire Pressure Variation

A couple of thoughts:

Air or nitrogen (or any gas for that matter) is going to behave the same regardless of the material the container is made out of.

There is a difference in the expansion (or contraction) rate of steel vs aluminum, the aluminum alloy being larger. That means that when the temperature drops, the alloy wheels will shrink more, and - perhaps - there is more leakage. If this is true, then when the temperature goes back up, the alloy wheels will have less pressure.

It's also possible that the measuring device is reacting differently.
CapriRacer is offline   Reply With Quote