Deestone D622 F78-14 ST. FEATURES AND BENEFITS: Trailer tire model; Improved handling; Upgraded durability; All weather traction; . OVERVIEW: The Deestone D622 F78-14 ST is a highway terrain, all season tire manufactured for trailers. This model comes in 14 inch rim diameter sizes. 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 detailed tread elements provide a high number of biting edges to the driving surface, firmly gripping the road while the tires are in motion. It greatly increases the tire's controllability and driving stability, allowing it to respond faster and more precisely to the towing vehicle's commands. As the tire's steering responsiveness is improved, the driver is able to confidently control the vehicle at all times. The combination of these features guarantees a better and safer driving experience in highway terrain conditions.This model also utilizes its reinforced construction that comes with bias-ply structure and nylon casing to enhance the overall durability. These strong structural materials prevent the tire from losing its optimal shape under load and driving pressure, enabling it to safely perform without deforming. It significantly improves the tire's carrying and withstanding capability, ensuring a phenomenal heavy-duty performance.The Deestone D622 F78-14 ST's durable compound and detailed tread design promote a phenomenal year round performance. The compound optimizes rubber flexibility in various temperature conditions, improving the tread's surface contact. The symmetric tread elements improve the traction on dry, wet, and snowy roads, enhancing the traction throughout the year. The circumferential grooves actively resist the risk of hydroplaning by eliminating water and slush from the footprint. It allows the tire to safely perform in rainy and snowy weather conditions.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.