you mean flat spot, or where the tire will be flat due to sitting in the same spot for a long time.
it all depends, how heavy the car is, how old/soft the tires are ect,
my crawler is heavy and on new softer tires, if i let it sit for 2 weeks or so it will start to flat spot, but i drive it a mile or so and they go away
what u should be worried about are the dry rott conditions, once you are dry rotted, and start heat cycling, the tires are more likely to have issues with chunking or seperating
aka if ur shits dry rotted, change them, dont use them, they are not safe