public float forwardSlip ;

Description

Tire slip in the rolling direction. Acceleration slip is negative, braking slip is positive.

using UnityEngine;

public class Example : MonoBehaviour { // Prints "braking slip!" when tire slips badly. void FixedUpdate() { WheelHit hit = new WheelHit(); WheelCollider wheel = GetComponent<WheelCollider>(); if (wheel.GetGroundHit(out hit)) { if (hit.forwardSlip > 0.5) print("braking slip!"); } } }