How tall is 23.1-26 tractor tire?

Tractor tire sizes are typically expressed in a series of numbers and letters. The first number is the tire's width in inches, the second number is the aspect ratio (the height of the sidewall as a percentage of the width), and the third number is the wheel diameter in inches. For example, a 23.1-26 tractor tire would be 23.1 inches wide, have a sidewall height of 23.1 * 0.26 = 6 inches, and fit on a 26-inch rim.