public void removeWheel(int wheel) {
        wheels.remove(wheel);
        rebuildRigidBody();
    }
This rebuilds the vehicle as there is no way in bullet to remove a wheel.

@param wheel the index of the wheel to remove (&ge;0, &lt;count)
jme3-jbullet/src/main/java/com/jme3/bullet/objects/PhysicsVehicle.java