A bolt structure is designed to fasten together a hub, an inner wheel rim, and an outer wheel rim of a motor vehicle wheel. The bolt structure comprises a bolt body, an inner nut, an outer nut, and a protective cap. The bolt body has a large diametrical segment, a small diametrical segment, and a midsegment located between the large diametrical segment and the small diametrical. The inner nut is engaged with the small diametrical segment, whereas the outer nut is engaged with the large diametrical segment and the protective cap. The midsegment of the bolt body retains the hub of the motor vehicle wheel.