Using wheel collider for square wheels

I have a voxel based vehicle with square wheels, and the wheels will never rotate.

I would like to use the physics provided by wheel collider. But I want the physics to behave as if the wheels were actually round and rotating. Is this possible?

 

Pretty sure you can as long as the square wheels don't have their own box collider

 

You have to do your own wheel mesh rotation when using wheel colliders so what the mesh looks like is irrelevant.