What is kumho at 51?

Kumho at 51 is most likely referring to Kumho Tire's ECSTA PS91 which is a high-performance tire designed for passenger cars that has a maximum speed rating of 300 km/h or 186 mph. This tire features the company's "ESCOT Technology" which optimizes sidewall stiffness and enhances steering response, as well as a compound that provides exceptional grip, even in wet conditions. Additionally, the tire has a tread pattern that provides uniform contact with the road for improved cornering and stability. Kumho Tire is a South Korean company that was founded in 1960 and is now one of the largest tire manufacturers in the world, selling tires in more than 180 countries.