At ConExpo 2026 in Las Vegas, Mack Trucks unveiled their all-new model, the Keystone. The Mack Keystone is an all‑new Class 8 vocational tractor. It represents a major expansion of Mack’s vocational lineup and introduces a new nameplate built on Mack’s latest shared platform—alongside the Anthem, Pioneer, and redesigned Granite.
It is engineered for construction, agriculture, logging, livestock hauling, and mixed‑terrain transport, offering the durability of the long‑running Pinnacle with modern tech and comfort upgrades.
Key Features and Innovations
Terrain Versatility
The Keystone is built to thrive where roads are rough, uneven, or nonexistent. It features:
- Higher ground clearance
- Improved approach angle
- Robust suspension system, including the available Mack Maxride for best‑in‑class ride quality on and off the highway
These upgrades make it suitable for hauling logs out of forests, delivering heavy equipment to job sites, or transporting goods across rural terrain.
New Platform and Shared Architecture
The Keystone uses Mack’s unified platform, meaning it shares:
- Advanced safety systems
- Digital architecture
- Interior refinements with the Anthem, Pioneer, and new Granite. This ensures a consistent driver experience across Mack’s newest models.
Configurations for Every Job
For the first time in this segment, Mack offers:
- Axle‑forward and axle‑back configurations
- Day cab, 44‑inch sleeper, and 64‑inch sleeper options
- 6×4, 8×4, and 8×6 rear axle setups
This flexibility allows fleets to tailor the truck to specific vocational needs.
Powertrain
The Keystone is powered exclusively by the Mack MP13 engine, delivering:
- Up to 540 HP
- 1,950 lb‑ft of torque
- Up to 6% improved fuel efficiency compared with the Pinnacle It pairs with the mDRIVE HD automated manual transmission for smooth, efficient operation.
Driver‑Focused Interior
The cab includes:
- Supportive seating
- Electronic braking system
- Optional digital mirror system
- Flat‑bottom steering wheel for more belly room
- Integrated ELD plate and organized device‑management features
Why the Keystone Matters
The Keystone marks Mack’s push to unify its highway and vocational platforms, giving vocational operators access to the same advanced tech found in Mack’s newest highway trucks—without sacrificing rugged durability.
Get in touch today to learn more about the new Mack Keystone.