The vocational truck market just got a major upgrade. Unveiled at CONEXPO-CON/AGG 2026, the all-new Mack Keystone is built to redefine what fleets can expect from a vocational tractor.
Designed for demanding environments — from construction sites and gravel roads to agricultural and heavy-haul applications — the Mack Keystone delivers a powerful combination of durability, versatility and advanced technology.
If your operation requires a truck that performs both on the highway and off the beaten path, the Keystone is built for exactly that.
Built for Tough Jobs and Tough Terrain
Vocational trucks don’t have the luxury of predictable conditions. That’s why the Mack Keystone was engineered with:
- Higher ground clearance to navigate rough terrain
- Improved approach angles to reduce damage
- Robust suspension systems designed for off-road performance
- Axle-forward and axle-back configurations for application flexibility
These features make the Keystone ideal for industries like:
- Construction
- Agriculture
- Logging
- Livestock hauling
- Heavy-haul operations
Unlike traditional highway trucks, the Keystone is purpose-built to handle jobsite conditions without sacrificing on-road performance.
Power Meets Efficiency
At the heart of the Mack Keystone is the proven Mack MP13 engine, delivering:
- Up to 540 horsepower
- Up to 1,950 lb-ft of torque
Paired with the MDRIVE HD automated manual transmission, this powertrain is designed to deliver smooth, consistent performance in even the most demanding applications.
But power isn’t the only story.
The Keystone also offers up to 6% improved fuel efficiency compared to its predecessor, helping fleets reduce operating costs while maintaining performance.
A Successor to a Proven Legacy
The Mack Keystone replaced the long-standing Mack Pinnacle, a staple in vocational trucking for over 20 years.
This isn’t just a refresh — it’s a complete evolution.
With the Keystone, Mack has reimagined what a vocational tractor can be by combining:
- Modern powertrain technology
- Advanced safety systems
- Enhanced driver comfort
- Increased operational versatility
Designed for Driver Comfort and Productivity
Driver comfort isn’t a luxury — it’s a productivity tool.
The Mack Keystone is engineered to reduce fatigue and improve the driver experience with:
- Advanced suspension systems for a smoother ride
- Improved cab engineering for better comfort on rough terrain
- Ergonomic design that supports longs days on mixed terrain routes
This matters in vocational work, where drivers often transition between highways, job sites and unpredictable road conditions in a single day.
Smart Technology That Keeps You Moving
Downtime is costly. The Keystone helps minimize it with integrated technology, including:
- Mack Connect telematics (included subscription)
- Real-time vehicle monitoring
- Remote diagnostics
- Proactive service scheduling
These features help fleets stay ahead of maintenance issues and keep trucks on the road longer.
Built for Versatility Across Applications
One of the biggest advantages of the Mack Keystone is its ability to adapt to your operation.
Available configurations include:
- Day cab and sleeper options
- Multiple axle configurations (6×4, 8×4, 8×6)
- Flexible setup for vocational or heavy-haul applications
This level of customization ensures the Keystone can be tailored to your exact needs — whether you’re hauling aggregate, equipment or agricultural products.
Why the Mack Keystone Matters for Your Fleet
The launch of the Mack Keystone represents a major shift in the vocational truck segment.
It brings together:
- Off-road capability + highway efficiency
- Power + fuel savings
- Durability + driver comfort
- Advanced technology + uptime solutions
For fleets operating in North Dakota, Iowa, Nebraska and beyond — where conditions can be unpredictable and demanding — the Keystone offers a smarter, more capable solution.
When Will the Mack Keystone Be Available?
The Mack Keystone is expected to be available for order late 2026, with availability through RDO Truck Centers.
Find the Mack Keystone at RDO Truck Centers
At RDO Truck Centers, we’re committed to bringing you the latest and most capable trucks on the market.
The Mack Keystone is more than just a new model — it’s a new benchmark for vocational performance.
Interested in learning more about the Mack Keystone? Contact your local RDO Truck Centers location today.