What is the purpose of VehicleWheel Shape->CollisionMesh?

Development World Creation
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1

I don’t understand the purpose of the “Shape” section of the VehicleWheel blueprints. It doesn’t seem to have any effect.

For example I can choose “cube” and the vehicle behaves just as if it were cylinder. A cube doesn’t show up when i visualize collision either, the tires show a sphere (which matches what’s defined in the phat physics body).

2

“The wheel Physics Bodies are never actually used for collision. Currently, the wheels use a ray casting for interacting with the world.”
from there:
https://docs.unrealengine.com/en-US/Engine/Physics/Vehicles/VehcileContentCreation