MR5 CENTERLOCK in Hot Wheels scale at 8x5.3mm.
They work with Hot Wheels axles with the ends removed and are made to use with the real rider low profile treaded tires..- comes unpainted, for the best finish please use light coats of Tamiya spray paint for plastic or airbrush if possible to bring out the details i.e. lugnuts, wheel bolts, lip step, etc.