Yup.
Sidewalls are so heavy you don't notice flat tire until your in machine and moving.
I now look at tire '"Top" and can see if it's "flat", should have a small amount of crown.
BTW I also ran 40-50 psi for years, until I got out my glasses, and read the ^%$#@! tire pressure printed on the side of the tire (in the smallest lettering of all of it on there....) and now air them to 70 psi.
Why they bend I don't know, I must rub them on something.
I am thinking about rolling up some rings of 1/2" dia. rod,
and weld it into the rim, in the lip, where a wheel weight would go
(if these were OTR tires) to strengthen that area from bending.