A dualie is a pickup truck with dual wheels on each side of its rear axle. The four tires spread weight over a broader area, which increases the truck’s payload and towing capacities. This design is available on heavy-duty pickups. Dualies are sometimes designated DRW, for dual rear wheel, especially in specifications. The regular wheel allotment is SRW, for single rear wheel.
Examples of trucks with available dualie configuration include the 2008 Chevrolet Silverado 3500HD, Ford F-450 and Dodge Ram 3500.
Information for this was taken from Cars.com’s glossary, written by Joe Wiesenfelder.
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