Hot Dipped and ready for all that nature can throw at it. Galvanized for long-lasting life in any environment. This 15 inch x 6 inch, Heavy Duty Trailer Rim will give your Boat Trailer the rugged Saltwater or Freshwater Protection it needs. This 6 Lug, (6 on 5 1/2 ) Bolt circle rim is fit to match 15 inch tires of all capacities. Galvanized Wheels are ideal or boat trailers, as the Galvanized coating repels and protects against corrosion. The most common tire sizes mounted on this wheel would be a ST 225/75.