I starter doing some vehicles and did a lot of research and tutorial watching.
And as Im no novice at skinning and rigging characters I decided to rig a buggy to the an edit of the original advanced vehicle skeleton and its workd perfectly.
So I created some new skeletons for an apc I have and when setting up the physics asset i Am getting a strange issue where once I set the wheel collisions as kinematic and hit simulate the wheels shrink.!!!
I have tried creating new skeletons and re-skinning and all sorts but each time I get the same problem.
Vehicle wheels normal size.
after I set kinematic and simulate both on convex and sphere collisions.
PS i freeze transforms on all bones and mesh prior to skinning.