1987 Bertone X-1/9 Tire Size
The original tire size for your 1987 Bertone X-1/9 is listed below. Tap on the box to view a color-coded explanation of the best Bertone X-1/9 tire size.
The original tire size for your 1987 Bertone X-1/9 is 185/60SR13. A color-coded explanation of the 1987 Bertone X-1/9's tire size is shown below.
This number indicates that your tire has a width of 185 millimeters.
This number means that your tire has an aspect ratio of 60%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 60% of the width. In this case, the sidewall height works out to be 111 millimeters.
This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous.
This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
The tire size was designed to fit rims or wheels that are 13 inches in diameter.