Rotate wheel around a specific pivot point

Hello,

I'm working on a forklift right now and I can't make my wheelcolliders rotate around a specific pivot point, they only rotate on their own pivot point. here are some picture for clarity:

what i got so far:

What i m trying to achieve (picture from 3dsmax):

As you can see, in max my wheel are not turning around theimselves but around the cylinder representing the turning mechanism of the forklift.

The problem in unity is that my wheel mesh are following my wheelcollider, and no matter what I try my collider will always rotate around itself, like if I was constrained by the physX implementation of the wheel collider. How would you do that?

something else, a forklift doesn't have any suspension but when I put it to zero I got all sort of vibrations, any idea? Thanks a lot. Mike