why my car is jump???

how can i canfigur whelli collider?

I just matched your settings in a new project. Yes. The car jumps like crazy. You should change your rigidbody settings. The wheel collider looks for the rigidbody mass. I assume your rigidbody mass is at the standard 1. Try to set it to 2000 instead. A regular car usually weighs around 1-2 metric tons, not 1 kilo.

Hope this helps :slight_smile: