Q:

# How many revolutions does a tire make in a mile?

A:

The number of revolutions a tire makes in 1 mile depends on the circumference of the tire. To find the tire circumference, which is the distance traveled in one revolution, multiply the tire diameter in inches (measured from opposite sides of the tire through its midpoint) by pi.

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There are 63,360 inches in 1 mile. This is found by multiplying the number of feet in a mile, 5,280, by the number of inches in a foot, 12. To find the number of tire revolutions in a mile, divide 1 mile in inches by the tire circumference.

For example, a tire with a 22-inch diameter has a circumference of 69.08 inches. The tire makes about 917 revolutions per mile.

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