National Road Max ST. FEATURES AND BENEFITS: All season traction; Enhanced controllability; Upgraded load durability; . OVERVIEW: The National Road Max ST is a highway terrain, all season tire manufactured for specialty 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 ideal tread design and the all season compound improve the dry, wet and winter weather road gripping ability. The symmetric ribbed tread design with the optimal siping placement upgrades the grip in versatile conditions with the additional biting edges. The durable compound keeps the rubber flexibility in different temperatures, from the heat of summer to colder winter situations. The tread's circumferential grooves prevent hydroplaning by dispersing water and slush from below the footprint, further enhancing the wet and winter weather traction.The symmetric ribbed tread design maintains the surface contact at all times. The better road contact enables the tire to improve the steering responsiveness and the driving stability. The steering becomes faster and more precise in its response to the towing vehicle's instructions, while the structure is secured against the driving pressure affecting the model. This ensures the towing vehicle's control over the trailer, making the towing process safer and easier. The results in a secure towing experience.The Road Max ST enhances the load and driving durability. The stronger structure maintains the ideal tire shape under the load and driving pressure affecting the tire throughout its performance. This enables the tire to carry and withstand heavy loads with ease, as the construction prevents the shape's deformation under the driving pressure. In this manner, the tire guarantees a safer heavy load performing capability and power. 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.