Originally Posted by
tomato coupe
Quite honestly, I can't follow your reasoning, because I can't figure out what your definition of "patch radius" is.
???
Look at the illustration.
It's the vertical distance from the center of the wheel to the ground. It's pointing directly at the part of tire that is being compressed.
Originally Posted by
tomato coupe
The effective radius of a tire is less than the unloaded radius, but greater than the loaded ("patch") radius that you show.
You "figured it out" here.
Originally Posted by
tomato coupe
Actually, measuring the "patch" radius in your diagram is trivial -- it's the distance from the center of the hub to the ground
You "figured it out" here too.