Car wheels stretches when rotating

So I have created a car and made the wheels a child of the parent wich in this case is the car but when I try rotate the wheels or any other child it just stretches and the scale becomes bigger. I think it is a easy fix but I dont know how?

The first thing that comes to my mind is wether your parent object is non-uniformly scaled, i.e. the scale is not equal on all of the three axes. If that’s the case, this is most likely causing the stretching when something is rotating as a child