Mileking Racing MK921. FEATURES AND BENEFITS: Summer weather traction; Enhanced controllability; High speed performance; . OVERVIEW: The Mileking Racing MK921 is a performance and high performance, summer tire manufactured for passenger vehicles and SUVs.The model improves the summer weather traction. The directional tread design, with the optimal tread block placement, and the summer tire compound increase the dry and wet weather traction. These tires upgrade the grip on the road surface with the ideal tread blocks and their siping detail, while the compound keeps the model cool during its high-heat performance. The tread's optimal groove pattern avoids hydroplaning by dispersing water from below the tire's footprint, further increasing the wet and winter weather driving safety.The tread design's ideal surface contact upgrades the overall controllability. The tread's continuous solid center rib keeps the tire's surface contact throughout the drive, boosting the steering responsiveness and the driving stability. In this manner, the steering becomes faster and more precise in its responsiveness and accuracy, while the structure is stabilized against the driving pressure affecting the model. The optimal shoulder block placement upgrades the cornering and maneuvering capability. These blocks enhance the number of biting edges gripping the road surface, which improves the cornering power. This combination ensures the driver's full control over the vehicle in summer weather conditions.The Racing MK921 also improves the high speed durability. The model combines the durable structure, the optimal surface contact and the heat-resistance of the compound to enable its utmost high speed performance. The compound keeps the tire cool and prevents heat build-up throughout its performance, while the tread design maintains the surface contact while the tires are in motion. The tire further improves the high speed durability with the stronger structure which does not deform under the high speed pressure affecting it. In this manner, the tire ensures a safer high speed driving experience. Manufacturers recommend changing tires every 10 years. As long as tires are properly stored before they are sold, the year of their manufacture will not shorten their service life.