The recent thread on asymmetrical structures
("How fast does the last catenary chain link fall?")
reminds me of this one.
A car is supported on four radials filled with air at 30 psi.
It skids on an icy patch and sustains a hit on a sidewalk
kerbstone. The driver feels an upward force from an acceleration
of 0.2 g upwards, and 0.2 g sidewards.
How did the force get transmitted from the tread to the axle?
(Radial sidewalls are weak in compression.)