Yokohama Off-Highway Tires has introduced the Alliance Agriflex+ 377 XT, an upgraded flotation tire designed for heavy agricultural machinery, including spreaders, combines, and grain carts. Featuring ultra-flexible VF (Very High Flexion) sidewall technology, the tire allows farmers to carry up to 40% more load at the same inflation pressure as standard radial tires—helping to minimise soil compaction and protect long-term soil health.
Soil compaction remains a major concern for farmers, as compressed soil can lead to yield reductions ranging from 7% to 70% annually. James Crouch, U.S. Product Manager of Agricultural Tires at Yokohama–ATG, emphasised the importance of managing compaction:
"Due to variables like different crops, soils, and environments, it’s hard to calculate the exact effects soil compaction will have on yield, but reducing unnecessary soil compaction while increasing load capacity is a net positive for both soil health and operation profits."
One of the standout features of the Agriflex+ 377 XT is its Cyclical Field Operation (CFO) designation. This allows for a 55% increase in load capacity when the tire is operating in cyclical conditions at speeds below 10 mph—critical for equipment that experiences fluctuating weight, such as grain carts during harvesting.
Yokohama has incorporated Stratified Layer Technology (SLT) into the Agriflex+ 377 XT, enhancing its durability and long-term performance. The tire’s steel-belted construction, premium carcass, and stubble guard compound provide protection against punctures and wear from sharp crop residue.
The Alliance Agriflex+ 377 XT features a modernised five-spoke sidewall design, aligning with the aesthetics of Yokohama’s Agri Star II and Agriflex+ 373 models. This updated look not only reinforces its structural integrity but also enhances the tire’s visual identity within the agricultural sector.
Yokohama backs the Agriflex+ 377 XT with a 10-year materials and workmanship warranty, alongside a 5-year stubble and field hazard warranty—highlighting the brand’s confidence in its durability.
The tire is currently available in the following sizes:
With its compaction-reducing performance, CFO-enhanced load capacity, and SLT-driven durability, the Alliance Agriflex+ 377 XT is engineered to meet the needs of modern, high-performance agricultural operations.
What is the Alliance Agriflex+ 377 XT?
A high-tech flotation tire for heavy agricultural machinery, featuring VF sidewall technology and a modernised design.
How does it reduce soil compaction?
It carries 40% more load at the same pressure as standard radial tires, minimising soil disturbance.
What is the CFO designation?
It allows for 55% increased load capacity when operating under cyclical field conditions at low speeds.
What technology improves its durability?
Stratified Layer Technology (SLT), steel-belted construction, and a stubble guard compound for puncture resistance.
What warranty does it offer?
A 10-year materials and workmanship warranty and a 5-year stubble and field hazard warranty.
What sizes are available?
Six sizes, ranging from VF1000/50R25 to VF750/60R46.
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