Car dont run as i wish

I created a car in isaac sim,follow this guide" Running Isaac Sim For the First Time — Omniverse Robotics documentation (nvidia.com)"I add the same speed to wheels,but it dont run a line.I also change the Collision Approximation to Bounding Sphere,it better,but problem also exits.Can someone tell me how to solve it?

hi @2934661830 can you provide a usd file that reproduces the issue?