The Cooper Discoverer True North 255/65r18 tires have a diameter of 32.7 inches, a width of 10 inches, and a tread width of 8.5 inches. They have a maximum load capacity of 2,415 lbs and a maximum pressure of 44 psi. They are designed for all-season performance and provide great traction in wet and dry conditions. The tires also feature a unique tread pattern that helps reduce road noise and provide a comfortable ride.