What Is Revolutions Per Mile?
Learn what tire revolutions per mile means, why it changes with tire diameter, and how it relates to speedometer readings.
Key Facts About Revolutions Per Mile
- Revolutions per mile estimates how many times a tire rotates while traveling one mile.
- Tires with smaller overall diameter generally rotate more times per mile than larger tires.
- Changing revolutions per mile can affect speedometer reading, odometer reading, gearing behavior, and tire comparisons.
- Published revolutions-per-mile values may differ from calculated estimates because real tires deflect under load.
Definition
Revolutions per mile: The approximate number of tire rotations required to travel one mile. It is useful for comparing tire sizes, but it is affected by actual loaded radius, tire construction, inflation pressure, and vehicle load.
Revolutions per mile estimates how many times a tire rotates while traveling one mile.
A larger tire generally has fewer revolutions per mile. A smaller tire generally has more revolutions per mile.
This value can affect speedometer readings, odometer readings, gearing behavior, and vehicle calibration assumptions.
Important reference note
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