rotation and friction not working as expected

as you can see in this video: https://youtu.be/shF56eqDxHc the objects rotating were expected to push themselves forward like cars of a wheel do, but unfortunately this doesn't appear to be the case. to rotate the objects i'm using theese lines of code: using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class rotaet : MonoBehaviour
 { private float rotZ;
 
 
     void Update()
     {
         rotZ += Time.deltaTime * -500;
 
 if (Input.GetKeyDown("f"))
 {
 
     }
            transform.rotation = Quaternion.Euler(0, 0, rotZ);
     
 }
 }

are there any easy ways for me to fix it?