This is a very simple tutorial on setting up skidmarks for any racing vehicle in your Unity projects. This method is independent of the type of vehicle or environment. It is also mobile friendly for your iOS or Android applications. The method I describe makes use of Unity's built-in WheelColliders and their "WheelHit" property. It also makes use of small Trailrenderers to render our tire tread marks behind the vehicle. As usual here is the link to the video, and don't forget the full source Unity project download link is in the video description! Enjoy.
Simple Skidmarks in Unity on Youtube