Hankook 1031623 Ventus S1 evo4 X K137A 275/40R21XL 107Y Summer Performance SUV Tire

The Hankook Ventus S1 evo4 X (K137A) is a premium ultra-high-performance summer tire engineered specifically for performance-oriented SUVs and crossovers. Designed for drivers who demand confident handling in both dry and wet conditions, this tire combines an aggressive tread architecture with advanced sidewall construction to deliver a refined yet dynamic driving experience.

Key Features:

• Advanced wet surface control: Precision-engineered shoulder grooves maximize wet braking performance by securing void areas under heavy braking loads and expanding the contact patch for improved grip
• Optimized dry traction: Maximized directional stiffness, particularly at the outer tread blocks, enhances dry road grip and cornering stability
• Noise-reducing shoulder block design: Specialized connector bars between shoulder blocks form a closed tread structure that minimizes cabin noise during normal driving
• Innovative sidewall construction: Engineered to resist wear while maintaining flexibility, ensuring consistent performance at elevated speeds
• Extra Load (XL) rated: Built to handle the higher loads typical of performance SUVs and larger vehicles
• BMW OE approved (*-marked): Meets original equipment specifications for BMW applications requiring this designation
• Black sidewall (BSW): Clean, classic appearance

Rated 107Y — a load index of 107 (2,149 lbs capacity) and a Y speed rating (186 mph) — this tire is built for high-performance driving. With a UTQG rating of 180 AA, it delivers top-tier traction and temperature resistance. The 275/40R21 XL fitment is designed for 21-inch rims with a recommended rim width of 9 to 11 inches.