dualtires

Dual tires, also known as "duallies" or "super singles" in some contexts, are a configuration where two tires are mounted side-by-side on the same axle hub on each side of a vehicle. This arrangement is most commonly found on the rear axles of heavy-duty trucks, buses, and other commercial vehicles. The primary purpose of dual tires is to distribute the load of the vehicle over a larger contact area with the road surface. This increased surface area helps to reduce ground pressure, which is beneficial for preventing damage to road surfaces, especially soft or unpaved ones.

The use of dual tires also contributes to increased tire load capacity. By sharing the weight between two tires, each tire experiences less stress, allowing the vehicle to carry heavier payloads. This is a critical factor in the efficiency of commercial transportation. In some cases, the inner tire of a dual setup may be slightly smaller or have a different tread pattern than the outer tire, depending on the specific application and manufacturer's recommendations.

While dual tires offer significant advantages in load distribution and capacity, they also have drawbacks. They can be more susceptible to damage from debris trapped between the tires, and maintenance can be more complex due to the need to inflate and inspect two tires per corner. The added rolling resistance of two tires can also slightly impact fuel efficiency compared to a single, wider tire, though this is often offset by the benefits of increased load capacity and reduced road wear. The specific setup and tire types used in dual configurations are carefully engineered to optimize performance and safety for the intended vehicle and its operating conditions.