Wheel Collider Problem on tires HELP!!!!!!!

Unity Engine
1

Hi

Im having problems with the wheel coliders I have created for the tires I have. I have wheel colliders on all four tires and have a script that allows me to move the car but when I press play the front wheels turn right and the car goes backwards and flips over

I am stumped as to why this is doing it cause all the wheels are set to 0 on the z axis same with all the wheel coliders. plus I have also tried sizing them up and down to see if that makes any difference.

This is the code that I have that makes the car move

    using System.Collections;
    using UnityEngine;
  
    public class Car : MonoBehaviour
    {
        public float maxTorque = 50f;
  
        public WheelCollider[] wheelColliders = new WheelCollider[4];
        public Transform[] tireMeshes = new Transform[4];
  
        void Update()
        {
            UpdateMeshesPositions();
        }
  
        void FixedUpdate()
        {
            float steer = Input.GetAxis ("Horizontal");
            float accelrate = Input.GetAxis ("Vertical");
  
            float finalAngle = steer * 45f;
            wheelColliders [0].steerAngle = finalAngle;
            wheelColliders [1].steerAngle = finalAngle;
  
            for (int i = 0; i < 4; i++)
            {
                wheelColliders[i].motorTorque = accelrate * maxTorque;
            }
        }
  
        void UpdateMeshesPositions()
        {
            for(int i = 0; i < 4; i++)
            {
                Quaternion quat;
                Vector3 pos;
                wheelColliders[i].GetWorldPose(out pos, out quat);
  
                tireMeshes[i].position = pos;
                tireMeshes[i].rotation = quat;
            }
        }
    }

This is what the inpector shows as you can see I only have a rigidbody on the main kart

Wheel Collider

2560Ă—1080 434 KB

Wheel Mesh

2560Ă—1080 427 KB

Go Kart

2560Ă—1080 477 KB

Here is the project file if anyone wants to have a look
http://ge.tt/73YNbdl2

1 Like
2

to make wheel collider to work correctly, you should create a extreme precise balance betwen rigidbody mass, drag and wheel mass, spring, damper, friction and forces. if you miss any value by 1 number, the whole car will jump. slide and roll over.
i suggest you donwload and open “the standard asset example project”, open the car scene and copy all exactly settings for the car rigidbody and wheelCollider.