Which unit is used to express the full circumference of the tire in the data?

• A. Inches
• B. Feet
• C. Meters
• D. Centimeters

Answer: (B)

The full circumference of a tire is a linear distance around a circle, so it’s expressed in a unit of length. In many tire data sets that use customary (imperial) units, feet are chosen because they keep the numbers compact and easy to interpret. A typical tire circumference falls in the range of about six to seven feet, which makes the value straightforward to read and compare without turning into a long or awkward number. Using feet avoids the larger or awkward numbers that would come from inches, and it stays consistent with other imperial measurements often used for tire data. Hence, feet is the most convenient and readable choice for representing the tire’s circumference in that data.