This 2-pack provides a complete, ready-to-install wheel solution for a variety of medium and heavy-duty trailers. Each assembly is a pre-mounted unit, featuring an ST205/75D15 radial tire fitted onto a 15-inch diameter by 6-inch wide steel wheel. The wheel is configured with a 5-lug bolt pattern on a 4.5-inch pitch circle diameter and features a 3.19-inch center bore. It is essential to verify that these specifications align with your trailer's hub requirements to ensure correct fitment and optimal performance.The ST205/75D15 tire is engineered for substantial load-bearing capacity and dependable service. Rated as Load Range C with a 6-ply construction, each tire can support up to 1,820 pounds. The tire's robust internal structure includes a full nylon cap ply, which significantly enhances its toughness and provides superior resistance to punctures and damage from road hazards.Featuring a deeper, optimized tread pattern, these tires are designed to deliver reliable traction on various road surfaces. The tread design also promotes even contact with the ground, helping to distribute the trailer's load uniformly. This contributes to stable towing characteristics, reduces irregular wear, and supports the tire's overall longevity under demanding conditions.These tire and wheel assemblies are well-suited for a broad spectrum of applications. They are an excellent choice for larger travel trailers, cargo trailers, boat trailers, and utility haulers, as well as for commercial and industrial equipment such as construction site trailers and heavy-duty utility carts.