Mack Launches All-New Keystone Vocational Tractor at ConExpo-Con/Agg 2026
Mack Trucks unveiled the Keystone, a new vocational tractor designed for harsh off-road and highway use, at the ConExpo-Con/Agg 2026 trade show.
540 hp
1,950 lb-ft
up to 6%
What Happened
The Mack Keystone is a new vocational tractor built on the legacy of the Mack Pinnacle, sharing advanced technology and safety features with the Mack Pioneer and Anthem. It offers higher ground clearance, a robust suspension, and the Mack Maxride suspension for demanding conditions. The truck is available in axle-forward and axle-back configurations, with three cab options: day cab, 44-inch sleeper, and 64-inch sleeper.
“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.”
“The Keystone is designed for terrain versatility; it thrives where the roads are unpaved, uneven or even nonexistent, then transitions seamlessly to highway driving.”
up to 6%
compared to the Mack Pinnacle
The Keystone is powered exclusively by the Mack MP13 engine delivering up to 540 hp and 1,950 lb-ft of torque, paired with the mDRIVE HD automated manual transmission. It includes Mack's uptime solutions with a five-year complimentary subscription to Mack Connect telematics.
Why this matters
The Keystone offers a unified platform with modern comfort and safety for heavy-duty jobs, responding to customer demand for terrain-versatile trucks. It marks Mack's first offering of axle-forward and axle-back configurations in this class.
Terms in This Story
- Vocational tractor
- A heavy-duty truck designed for specific job applications like construction, logging, or agriculture.
- Axle-forward
- A configuration where the front axle is positioned closer to the front of the vehicle, affecting weight distribution and maneuverability.
- Axle-back
- A configuration where the front axle is set back from the front, often used for better weight distribution on rough terrain.
- mDRIVE HD
- Mack's automated manual transmission designed for heavy-duty applications, providing smooth and efficient power transfer.
Summarised from the linked release; details can be imperfect — always verify against the original source.