Collider stays in Place But mesh Sinks in the ground

Unity Engine
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1

I am Using a wheel collider on a tyre and the issue I am facing is that the collider stays in place. But, the mesh of tyre is passing / sinking through my plane / ground. The figure is attached.
First one is in rest position.

7477214--919363--upload_2021-9-7_10-59-14.png
7477214--919363--upload_2021-9-7_10-59-14.png1365×641 167 KB

The second one is when I drop the sphere/tyre from some height.

7477214--919364--upload_2021-9-7_11-0-12.png
7477214--919364--upload_2021-9-7_11-0-12.png1366×641 169 KB

The collider is above the plane but the mesh of tyre has passed through the plane. It becomes okay when sphere is at rest.

2

Try using a cube and scale it, If that didnt work, try another method.