Greenball Hiway Master ST Bias . FEATURES AND BENEFITS: All weather traction; Enhanced controllability; Improved durability; . OVERVIEW: The Greenball Hiway Master ST Bias is a highway terrain, all season tire manufactured for trailers. This tire is NOT MEANT TO BE MOUNTED ON LIGHT TRUCKS, as its construction will not support the weight and performing style of such vehicles. It can ONLY BE MOUNTED ON TRAILERS.The tire promotes great all weather traction. The ribbed tread pattern with the optimal siping detail, solid shoulder area and zigzag circumferential grooves boosts the dry, wet and winter weather road gripping ability. The tread design's constant road contact upgrades the year round performance and ensures a firm road grip throughout the year. The zigzag circumferential grooves prevent hydroplaning by dispersing water and slush from below the tire's footprint. The increased hydroplaning resistance and all weather traction upgrade the all weather performing capability.The model's constant road contact upgrades its all weather controllability. The ribbed tread design improves the steering responsiveness and driving stability. The tread pattern's constant road contact stabilizes the structure against the driving pressure affecting it and improves the steering response time and accuracy to the towing vehicle's instructions. The solid shoulder ribs enhance the cornering and maneuvering capability, ensuring a comfortable and safer performing capability.The Hiway Master ST Bias offers exceptional towing and load durability. The reinforced bias ply construction optimizes the structure against the pressure affecting it while the trailer is being towed. This improves the load carrying and withstanding capability and promotes a secure towing experience as the tire's optimal shape does not deform under the towing and load pressure affecting the model.This is a bias ply or diagonal tire. Due to the tire's internal construction and size, it is possible that the tire will look deformed. Smaller diagonal 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. 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.