With demanding cycles and high-tonnage requirements, managing a quarry and mining jobsite can feel like a constant battle against operational costs.
From selecting the right tire to optimizing your heavy equipment fleet, the variables are many. However, none are as critical as the surface beneath your machines. Your haul road is crucial when determining how long your off-the-road tires survive. In this guide, we break down the four pillars of haul road design and the essential practices that help prevent premature tire failure.
The High Cost of Neglect
For fleet managers operating dump trucks, loaders, and earthmover equipment, road maintenance is a non-negotiable component of profitability.
Ignoring road conditions doesn’t just lead to faster tire wear; it compromises operator safety, increases rolling resistance, and invites unnecessary downtime.
Road Width: Leaving Room to Operate
Narrow roads force heavy-duty equipment into tight maneuvers, causing lateral forces to spike. This puts immense strain on the sidewall and tire construction, leading to uneven wear and reduced durability. The MAXAM standard for safety and performance is simple: lane width should be at least double the vehicle width.
| Truck Width | Recommended Lane Width |
| 12 ft. | 24 ft. |
| 16 ft. | 32 ft. |
| 20 ft. | 40 ft. |
| 24 ft. | 48 ft. |
Adequate width allows for smoother turns, protecting radial tires from the scrubbing that reduces lifespan. For articulated trucks, proper spacing is the difference between achieving full load-carrying capacity and suffering a catastrophic sidewall failure on a narrow curve.
Eliminate Hazards with Proper Drainage
Standing water is a deceptive threat on quarry and mine sites. It conceals sharp debris like rocks, rebar, and broken tread fragments that cause immediate punctures. Furthermore, poor drainage softens the road base, creating deep ruts that trap tires and increase heat buildup.
Proper drainage systems are essential to:
- Expose Hazards: Keeping the road dry allows for real time obstacle detection.
- Protect the Casing: Constant moisture can degrade the rubber, making retreading impossible later.
- Maintain Efficiency: A stable surface reduces the energy needed to move, improving fuel efficiency.
Road Grade and The Steep Cost of Incline
In the OTR tire world, verticality is a critical metric. As the slope increases, the tire life percentage drops significantly due to increased torque and thermal stress.
| % Grade | Expected % Tire Life |
| 0% | 100% |
| 10% | 80% |
| 14% | 65% |
| 18% | 50% |
Once grades exceed 10%, tire performance enters a danger zone. High inclines concentrate stress on the drive axle, leading to tread separation and internal damage.
Pro Tip: When steep grades are unavoidable, fleet managers must adjust tire pressure, monitor inflation pressure closely, and conduct frequent tire inspection rounds. You can use this formula to easily calculate % grade:
The Importance of Road Care and Maintenance
Routine maintenance goes beyond simple aesthetics. Every pass made by a grader to smooth a surface or widen a radius pays dividends in reduced tire repair costs.
| Road care | Impact on tires |
| Smoother road surface | Prevents cuts, punctures, breaks, and separations |
| Reduced grades | Reducing excess wear on tires, extending tire life |
| Wider road width | Allows optimum safety |
| Wider punctures radius and no negative curves | Reduces spillage and less cut damage to tires, extends casing life by eliminating high lateral tire forces |
| Proper hauling distances | Reduces chances of heat separations from excessive TMPH/TKPH |
| Drainage system | Reduces potential deep cuts and cut separations from sharp debris |
Daily Disciplines for OTR Success:
- Scheduled Grading: Don’t wait for ruts; proactively maintain the surface.
- Debris Removal: Sharp rocks and metal fragments are the leading causes of tire failure.
- Speed Management: Higher speeds on unmaintained roads generate excessive heat. Respect the limits for your specific tire size and tread patterns.
Below is a good example of a proper haul road.
Beyond the Road: Other Important Factors
While the road is the foundation, your operating conditions involve other factors that influence tire wear:
- TKPH/TMPH: Monitor these values to prevent heat-related failures during long hauls.
- Length of haul
- Cycle times and speeds
- Grades
- Curves
- Underfoot conditions
When road conditions are optimized, tire performance peaks. You will see fewer blowouts, longer intervals between retreading, and a significant drop in operational costs. Investing in your roads is the most effective way to ensure your OTR tires achieve their full potential.
