OK,
Today I broke out the snow blower to get it ready for clearing the driveway when we do get the white stuff.
I got it fueled up, got the oil drained & replaced (hadn?t done that in a couple of years) aired up the tires, a couple of PSI of leakage, and checked the tread depth.
When I engaged the drive and took it around the driveway to check out the drive belt still engaged properly, I noticed that there is a flat spot on the tires where they sat through the summer. They have “bump” when the tires rotate to that spot.

Strange, anybody else have this happen to them ?