The Soviets created the ZIL-E-167 6×6 in 1962 to reach far-north towns in any weather (or to invade the U.S. via the North Pole, if you follow certain conspiracy theories). It's powered by two ZIL-375 3.5-liter V8s positioned at the back. The entire thing measured 30 feet long, 9 feet wide, and 9 feet high (though another source said it was 10 feet wide and 10 feet high). It had a curb weight of 12 or 15 tons and a carrying capacity of 7tons. ¹⁾

Sheikh Hamad bin Hamdan Al Nahyan is well-known for constructing huge copies of Dodge Power Wagons and Willys Jeeps. But he also designed, or had designed, this 10-wheeled special SUV. According to reports, it combines a Jeep Wrangler and an Oshkosh M1075 military truck. The engine is a 600-horsepower Caterpillar C15 15.2-liter six-cylinder diesel. The truck itself is 35 feet in length. ²⁾

Subsequent designs grew in size, starting with the initial 4×4 tractor with three trailers and gradually adding trailers and wheels until it became the world's longest road train. The LeTourneau TC-497 Overland Train MkII eventually had four gas turbine engines in its tractor part, each producing 1,170 hp for a total of 4,680 horsepower and spinning generators to power the 54 motors, one in each of the train's 54 wheels. There were a total of 12 trailers. By the time the Army reconsidered it in 1962, powerful helicopters capable of lifting whatever the Land Train could transport had rendered it obsolete. The project's total investment was $3.7 million. ³⁾

The Self-Propelled Modular Transporter, or SPMT, was meant to move extremely large objects such as bridges, oil rigs, residences, or ships weighing up to 15,000 tons. They look, at first glance, like large multi-wheeled skateboards that can work together to move large loads or individually for minor hauls. ⁴⁾