The FSTONE FS422+ in size 315/80R22.5 156/150L is a steer axle truck tyre designed for easy maneuvering in both wet and dry conditions, typically used for regional transport and on-road applications. 
Key Specifications and Features:
Size: 315/80R22.5
315: Tire width in millimeters.
80: Aspect ratio (sidewall height is 80% of the width).
R: Radial construction.
22.5: Rim diameter in inches.
Load and Speed Index: 156/150L
156: Maximum load capacity in single fitment (corresponds to approximately 4000 kg).
150: Maximum load capacity in dual fitment (corresponds to approximately 3350 kg).
L: Speed rating, indicating a maximum speed of 120 km/h (75 mph).
Application: Steer axle position, generally for on-road, regional transport.
Tread Pattern: Features a low-noise tread design with an innovative "groove fence" feature to enhance driver comfort.
Durability: Built with a robust, retreadable casing to extend the tyre's life.
Performance: Provides good grip on wet surfaces and has low rolling noise (around 69-70dB).