Usually when a wheel is destroyed the whole thing will come off and the tire is separated from the rim.
What if the wheel can be destroyed in two more ways?
What I am saying is that the tire and the rim will each get damaged differently or there is a chance that the tire can get destroyed before the rim or the rim before the tire.
The tire gets destroyed if it is hit directly or from falling from a high place (once if it’s from a high like the mountain or it just gets damaged from a small fall). When the tire is destroyed, the tire will pop, leaving just the rim, this will slow the car down a little bit.
The rim get destroyed if it is hit directly or it takes a smaller amount of damage when it hits the ground at certain heights. When the rim is destroyed it will fall off as usual but the tire stays on if it hasn’t already been destroyed.
The tire and the rim will count as different parts (which will most likely mean that each car with WHEELS get +8 parts), the destroyed rim won’t despawn if the tire on it isn’t destroyed.