Agree and that deflection is about #1 Heat generation #2 control
#1 squirm, wave, etc are some of the terms, along with deflection. Bending and
the heat generated from bending/flexing.
This is what is left of a tire found on the side of the road and took it for
this type of discussion

The side wall bend back is small on low aspect ratio tires, but this one flexed
till the side wall broke down. Obviously heat damaged sidewall from
close inspection
Another one saw and took pic for this type of discussion, but it held together
till the whole carcass broke down and the tread separated

This one had the chance to talk to the lady, who said she asked her husband to
lower the pressure for a softer ride. Used this opp to teach the kid why and how
this happened



#2 control and what meant by keeping the tire's shape. Mainly during maneuvers
(braking, acceleration, cornering, etc)
Slip angle changes with PSI vs max PSI rating. Rim width also factors slip angle
In order to calculate, need the specifications of the tire and only
the OEM's test data can do...or develop your own empirical data...why
posted the chalk and tape method for the general owner without benefit
of OEM data