The Inje GT Masters is Korea’s only amateur endurance racing championship, providing aspiring amateur drivers with real race experience and serving as a representative series that contributes to the expansion of grassroots motorsport participation in Korea. Being held five times annually at Inje Speedium, the event is centered around endurance racing and is operated in conjunction with a variety of experiential and cultural programs, establishing itself as a comprehensive motorsport event that can be enjoyed by both participants and spectators alike.

Since 2024, Kumho Tire has participated in the Inje GT Masters as the official tire supplier, exclusively providing ECSTA racing tires to all competing vehicles. With outstanding durability and stable grip, these tires deliver consistent performance even under long-distance racing conditions, supporting amateur racers in competing safely while maintaining dynamic race performance. Through this involvement, Kumho Tire continues to strengthen its technological credibility in grassroots motorsports while further expanding its image as a high-performance brand proven across racing environments of various levels.