12" Aluminum 7 Spoke Trailer Wheel. The exact size is 12" x 4" 4 lug on 4" bolt pattern. The offset is zero. Max load is 1520 Lbs per wheel. This listing is for the wheel only. Most common tire sizes mounted on this wheel are 4.80-12, 5.30-12, 145R12, 155R12. Chrome Center Cap with Pop-off cap for easy greasing is included. Center Hole Diameter is 2.82 inches.