If you're in the market for a new trailer, or are simply curious about the specifications of your Harbor Freight trailer, you may be wondering what the bolt pattern is. The bolt pattern on a Harbor Freight trailer is 5 x 4.5 inches. This means that there are five bolts spaced evenly around a circle that has a diameter of 4.5 inches. These dimensions are important to know if you're looking to replace wheels or tires on your trailer, or if you're looking to attach any accessories that require specific bolt patterns. Knowing the bolt pattern of your Harbor Freight trailer will ensure that you get the right parts and accessories for your needs.