What are dual rear wheels?

Also known as dual rear wheel (DRW) trucks, this system consists of two tires placed side-by-side on the same axle. Typically found on the rear axle of the vehicle, this setup distributes the weight more evenly across a larger surface area, providing extra grip on the road. This is why companies and individuals who regularly load their vehicles heavily or drive on rough terrains often choose this configuration.

Dual rear wheel vs. single rear wheel

In addition to dual rear wheels, you can also opt for single rear wheel (SRW) systems. While dual rear wheels are ideal for vehicles carrying heavy loads or driving on rough terrain, single rear wheels are better suited for lighter loads. Vehicles equipped with SRW tires are also easier to maneuver in urban environments where vehicles need to fit into tight spaces. In this case, additional stability is not required, but it’s still beneficial to have a vehicle that doesn’t take up too much room.

Dual rear wheel systems in practice

As mentioned, these systems are used across various sectors, from agriculture to logistics. Here's a breakdown:

Agricultural machines: For tractors and other farming vehicles, dual rear wheels provide significant benefits. A tractor with dual rear wheels offers the driver much more traction in the field. This extra grip is crucial during harvest or plowing when vehicles are often on unpaved or even muddy land. The tires help prevent the vehicle from sinking into the ground.

Vans: Various vans designed for heavy-duty cargo, like the Iveco Daily or Mercedes Sprinter, benefit from dual rear wheels. With this system, drivers can transport more cargo without compromising stability or safety. These tires make it possible to carry up to 5000 kg instead of the typical 3500 kg. Additionally, the van can still be driven with a standard driver’s license (category B), as it’s technically considered a scaled-down truck.

Trucks: While lighter trucks often use single rear wheels like supersingle tires, for trucks exceeding 12 tons, dual rear wheels remain the standard. The reason is similar to their use in vans: the vehicle's weight and load are better distributed, providing greater stability and road grip.

Why choose dual rear wheels?

The advantages of dual rear wheels are clear, but let’s sum up some of the most important benefits:

Better stability: The main advantage of DRW systems is the increased stability they offer, especially with heavy loads. With a larger tire surface in contact with the road, you get better traction, which is particularly useful on rough terrains like those in agriculture.

Improved weight distribution: Since the load is spread across four tires instead of two, each tire experiences less pressure. This reduces tire wear and lowers the risk of blowouts.

Increased safety: As mentioned above, DRW systems reduce the risk of a blowout. In the event of a puncture, the other tire in the pair remains intact, allowing the vehicle to come to a safe stop. This is a significant advantage over single rear wheels, where a flat tire can often result in loss of control, particularly with heavy loads.

The importance of tegular maintenance

While the benefits of dual rear wheel systems are clear, it’s essential to note that these systems require more maintenance than single rear wheels. Since there are two tires side by side, it’s crucial to ensure that the distance between them remains consistent. Insufficient tire pressure can cause the two tires to bulge outward and rub against each other, which can be dangerous. Regular inspections are vital to continue enjoying the benefits of dual rear wheels.

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