Hi-Run SU19 Smooth. FEATURES AND BENEFITS: Turf friendly performance; Enhanced controllability; Smooth traction; . OVERVIEW: The Hi-Run SU19 Smooth is an all season tire manufactured for lawn mowers and other garden equipment.The tire promotes excellent traction. The completely smooth tread design enhances the tire's contact with the turf and terrain surface, which improves its traction and performance. This tread pattern enables a smooth performance as it maintains a close road contact with the turf surface at all times. The better traction enables the tire's year round performance.The tread pattern allows the tire to perform in a turf friendly manner. The tread design does not feature any tread elements that can harm the turf and grass field during the tire's performance as it ensures a smooth traction and turf surface contact at all times. As a result, the tire is perfect for lawn mower applications.The SU19 Smooth offers superb controllability. The tread design's round shoulder construction enhances the model's controllability and cornering capability. It makes the tire more responsive to the driver's instructions as it closely follows the road surface at all times. This also allows the tire's sharp cornering and maneuvering capability and power, guaranteeing a secure performance.This is a bias ply tire. Due to the tire's internal construction and size, it is possible that the tire will look deformed. Smaller bias ply tires do not have reinforced constructions that can keep the tire from deforming. The bias construction and the small tire's non-reinforced internal structure allow the tire to fold in when it is deflated or not properly inflated. This is not constructional damage or an issue; it is a normal occurrence with such tires. In such cases, the tire needs to be mounted and inflated to the proper PSI or, in some instances, an inner tube needs to be added. The proper PSI and the inner tube are able to maintain the tire's ideal shape, preventing the bias plies from looking deformed. This ensures their performing safety and durability. The photo is a representation of the tire's possible deformation, it does not represent the specific tire model, size, tread pattern and application. This specific tire model features a BIASED ply construction. 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.