I love the idea of putting hobby grade wheels on these cars so I remixed this to fit my Nikko Plymouth Superbird. The rear fits on to the existing 3.5M hex by friction and then the existing 4mm axle can be used to keep the wheel secure. For the front I replaced the pin axles with a M4 screw and some washers. you may have to adjust based on the axle diameter and offset you wish to use on your rig.