Mack debuted its newest truck earlier this month.
On March 2, Mack nveiled the all-new Mack Keystone at the Las Vegas Motor Speedway, ahead of CONEXPO-CON/AGG 2026, March 3–7 at the Las Vegas Convention Center.
Mack KeystoneMack Trucks
A purpose-built Class 8 vocational tractor designed to thrive in the most demanding on- and off-road environments, the Mack Keystone combines terrain versatility with the latest advancements in driver comfort, safety technology and Mack’s durability. In addition to North American markets, the Keystone will be available in select international markets, marking the first time Mack has offered this class of vocational tractor in Latin America.
“The Mack Keystone represents our commitment to providing customers in agriculture, construction and vocational markets with a truck that’s as capable on rough terrain as it is on the highway,” said Stephen Roy, president of Mack Trucks. “Named after the Keystone State of Pennsylvania, where all Mack Class 8 models for North America and export are assembled at Lehigh Valley Operations in Macungie, the Keystone continues Mack’s tradition of building rugged, reliable trucks that work as hard as the people who drive them.”
The Keystone is engineered for customers who operate in construction, agriculture, logging, livestock hauling and other applications that require a truck capable of performing on highways and challenging off-road terrain. Key to this capability is the Keystone’s higher ground clearance, approach angle and robust suspension system. The available Mack Maxride suspension is specifically engineered to deliver ultimate performance on the most demanding road conditions, providing best-in-class ride quality whether on highway or rough terrain.
For the first time, Mack is offering this class of vocational tractor in both axle-forward and axle-back configurations, providing customers with greater flexibility to match their specific operational needs. The Keystone is available in three cab configurations: day cab, 44-inch sleeper and 64-inch sleeper, each offered in both axle positions. Rear axle configurations include 6×4, 8×4 and 8×6.
The Keystone shares its interior architecture with the Mack Pioneer, bringing the same level of driver comfort and ergonomic excellence to vocational applications. The cab features wrap-around controls and high visibility.
The Keystone introduces a new modular bumper system designed to accommodate various tow configurations while maintaining a clean, functional appearance. A new bullet lamp on the cab roof provides improved visibility and compliance contributing to the truck’s distinctive character.
The Keystone is powered exclusively by the Mack MP®13 engine, delivering up to 540 horsepower and 1,950 lb-ft of torque to tackle the most demanding heavy-haul applications. Paired with the proven mDRIVE™ HD automated manual transmission, the Keystone delivers smooth, efficient power transfer in any terrain. The advanced powertrain delivers up to 6% improved fuel efficiency compared to the Pinnacle, helping customers reduce operating costs without sacrificing performance.
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