October 18 – Linglong Tire achieved a major breakthrough at its Changchun plant as the first independently developed 59/80R63 “Linglong” brand giant all-steel radial off-the-road (OTR) tire successfully rolled off the production line.

The launch of the 59/80R63 marks Linglong’s official entry into the elite global group of manufacturers capable of producing 63-inch all-steel giant tires. With a diameter exceeding 4 meters and a single tire weight of over 6 tons, this product is currently the world’s largest tire by size. It is primarily designed to equip large mining dump trucks used in open-pit mines, meeting the demanding conditions of complex, variable, and high-intensity mining environments.

As a company with nearly 40 years of experience in the OTR tire sector, Linglong has accumulated profound technical expertise since producing its first agricultural bias tire in 1987, continuously expanding its three main product lines: engineering machinery, agricultural, and industrial tires. During the R&D process of the 59/80R63, Linglong overcame a series of key technical challenges related to structural design, material formulation, and manufacturing processes for giant radial OTR tires, demonstrating strong independent innovation capabilities.

The rollout of the 59/80R63 not only fills a gap in Linglong’s portfolio for 63-inch giant radial OTR tires but also signifies that the company possesses the comprehensive strength to compete with world-leading tire manufacturers in the giant tire sector. This single tire has a maximum load capacity of 100 tons and can be fitted to mainstream large mining dump trucks such as the Caterpillar 797 and Komatsu 980.

Regarding technical details, the tire features a high-saturation tread pattern design, combined with multiple cooling groove structures and an ultra-low temperature curing process. This enhances heat dissipation efficiency while significantly improving the rubber compound’s resistance to cutting and its durability, effectively extending the tire’s service life under extreme operating conditions.

To meet market demand for OTR tires, the company initiated a comprehensive upgrade plan for its OTR tire capacity as early as 2022. Within its “7+5” global strategic layout, Linglong is implementing a “3+3” OTR tire industrial layout. This means planning OTR tire production capacity at three domestic bases in China and three overseas bases. The successful launch of the 59/80R63 is a crucial step in implementing Linglong’s “3+3” global strategic plan for OTR tires.