The massive tractor designed to move the heaviest tanks on Earth

Countries & Cities · Published 14 October 2026 Swipe more like this →

In short: Moving a main battle tank isn't just about raw power; it's about navigating complex infrastructure without destroying it. The Oshkosh M1070 was engineered to solve this specific paradox, balancing the extreme weight of the M1 Abrams with the delicate requirements of international roads.

The Oshkosh M1070 is a heavy equipment transporter (HET) designed primarily to haul the M1 Abrams main battle tank. To do this, it utilizes the M1000 semi-trailer as part of the Heavy Equipment Transport System (HETS). Beyond tanks, it serves as a prime mover for armored personnel carriers, self-propelled artillery, and heavy bulldozers. While the standard A0 and A1 models are workhorses of the U.S. Army, a specialized derivative called the M1300 was developed specifically to be road-legal within Europe, requiring a different trailer and specific weight redistribution from the front axle to meet European Union standards.

The engineering of the M1070 reflects a focus on extreme durability and versatility. A minimum yield strength of 758 MPa is achieved by using heat-treated carbon manganese steel for the chassis construction. Equipped with three winches—two of which hold 24,947 kg—the unit also incorporates a 3.5-inch Holland fifth wheel that floats fully. For mobility, the A1 model is powered by a 700 hp Caterpillar C-18 engine paired with a seven-speed automatic transmission. It also includes a central tire inflation system (CTIS) with four terrain settings—Highway, Cross-Country, Mud & Snow, and Emergency—allowing operators to adjust tire pressure on the fly.

Current military requirements are pushing these limits even further. The U.S. Army is currently developing the Enhanced Heavy Equipment Transporter System (EHETS) to replace the M1070 series. The goal is to transport a combat-loaded M1 Abrams and its associated M88 recovery system, which can exceed 84,000 kg. The current M1070A1 and M1000 trailer are technically unable to handle such loads. To improve crew safety during these high-stakes operations, the Army also developed the Heavy Equipment Transporter Urban Survivability Kit (HUSK), which adds armored replaceable cabs featuring blast-mitigating mats and automatic fire extinguishing systems.

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