The ribbed tread design closely follows the road surface and it maintains the tire's constant contact with the road to improve the steering responsiveness and driving stability. In other words, the steering is faster and more precise in its response to the towing vehicle's instructions, while the structure is stabilized against the driving pressure affecting the model. The shoulder tread block pattern upgrades the cornering capability with additional biting edges, while at the same time it prevents side slipping to promote a secure towing experience.