Falken Azenis FK450 AS All-Season Radial Tire - 235/50R18 97W Uncompromised All-Season Ultra High Performance Asymmetric rib and block hybrid type design allows for quick vehicle reaction, maneuverability and on-road feel. Tapered notched grooves create break-off points for snow packed into tread surface. Long sweeping tread grooves clear water with minimal cavitation for great wet-driving performance. Vertical tread notches help minimize any loss of traction when transitioning from straight-line driving to corners.