in the video you linked, the guy is using a cylinder mesh for its wheel collisions, how many times am I going to say this x) of course this solution does not work. wich is why I dont do it. My goal is to make this vehicle class as reliable as the wheeled vehicle class provided with the engine, exept much easier to setup. You may have noticed that the default wheeled vehicle class require very specific workflow to setup a vehicle using it, you need to skin the mesh, offset the wheels collisions to be at the right location to match the wheels, and so much more. People are more than often left with very unsatisfying results. Wich is what I am trying to solve with this. It is not perfect just yet, the default class is far from perfect too. But I hope some people still find it usefull, or at least that it allowed some people to learn things.
have a good day!
Edit: you can clearly see in my videos that the vehicle is going over 170 km/h. and the wheels are not bouncing around. Even on landscape. And because I chose static mesh terrain does not mean it does not work on landscape! Just give the project a try, tweak the values as you like and you’ll see 