AUTODUNK Trailer Spare Tire Carrier is fit for trailer tongues to 2.95″wide and 3.94″ high, To hold 4-lug and 5-lug wheels with 3.94″, 4″, 4.25″ and 4.72″ bolt patterns. Designed to hold max load up to 120 lbs, and galvanized material is rust and corrosion.