Power on the ground: what defines a tire for high‑horsepower tractors?

Every tractor needs the right tire

Tires on high-horsepower tractors can be compared to the shoes of a marathon runner or a sprinter. They are the only point of contact with the ground and therefore play a crucial role in overall machine performance. For this reason, agricultural tires must be engineered with extreme precision to ensure reliability, traction, and durability in demanding field conditions.
When agricultural machines weigh tens of tonnes and deliver hundreds of horsepower, choosing the right high-performance tractor tires can make a significant difference in both productivity and safety. Modern agricultural tires are designed with reinforced casings and advanced compounds that provide the ideal balance of strength and flexibility. This allows them to withstand the enormous loads and stress generated by today’s powerful farming equipment while maintaining optimal ground contact and performance.

Working with high loads: the tire’s role

One of the most important characteristics is the ability to operate under heavy loads while reducing the soil compaction, which represents an important challenge in today’s most demanding farm activities. For this reason, choosing the right tire can make a big difference for soil health and farm productivity, especially for these high-performance machineries category.

When working in the field, it is generally recommended to lower tire inflation pressure in order to increase the tire footprint. This activity is crucial for two main purposes:

• Increase significantly the tractor’s pulling capacity
• Preserve soil fertility, which, although often underestimated, is a situation that can really limit agricultural yields in extreme cases. Read here our dedicated article on this phenomenon

VF (Very High Flexion) tires are particularly well suited to this type of application, as they can carry up to 40% more load at the same inflation pressure as a standard tire. Conversely, they can carry the same load as a standard tire at 40% lower pressure, benefiting both traction and soil compaction. Moreover, VF technology is especially advantageous in high-horsepower tractors because:

• It enables a significant increase in performance, building the already high working capabilities of these machines, and further enhancing them through this technology. A tractor’s traction capacity depends on its operating weight (within certain limits specified in technical data sheets) and ground adhesion. VF technology improves both aspects: it allows increased load capacity at the same pressure and reduced pressure at the same load compared to standard tires
• These tractors are often equipped with a centralized tire inflation and deflation system that can be operated directly from the cab, without the need for external compressors

Mitas’ latest innovation for high-horsepower tractors

The ongoing trend toward increasingly powerful tractors has led Mitas to further expand its product portfolio for this powerful segment with the introduction of GRANTERRA. A benchmark solution for high-horsepower machines, GRANTERRA features an innovative tread design that enhances stability through more uniform load distribution. This helps reduce soil compaction and extend tire service life. The increased tread depth ensures excellent traction even in the most demanding conditions, maintaining high levels of grip and stability.

VF PFO technology allows operation at reduced inflation pressures, benefiting both the tractor’s pulling capacity and soil preservation. PFO, which stands for Pressure Field Operation, specifically refers to the ability to reduce inflation pressure at the same load during low-speed field operations (5–15 km/h) and high-torque applications. This results in a wider footprint and a more uniform distribution load.

Discover all the features of Mitas GRANTERRA on our website.

Advanced technology serving modern agriculture

Behind an apparently simple component such as a tire lies a range of technologies and engineering solutions specifically developed to ensure high comfort and maximum safety. Understanding the key characteristics required for tires on high-horsepower tractors is essential to fully leverage the performance of modern agricultural machinery.