Expert tire knowledge driving you safely on every road ahead.
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Tire Size Calculator
| Tire Height (Diameter) | 0 in / 0 mm |
| Wheel Size | 0 in / 0 mm |
| Sidewall Height | 0 in / 0 mm |
| Tire Width | 0 in / 0 mm |
| Tire Circumference | 0 in / 0 mm |
| Revolutions per Mile | 0 |
| Revolutions per Kilometer | 0 |
Understanding Tire Sizes
Tire sizes are represented by a code that contains three main numbers:
Width
The first number represents the tire's width in millimeters from sidewall to sidewall.
Aspect Ratio
The second number is the aspect ratio, representing the tire's height as a percentage of its width.
Wheel Diameter
The last number indicates the wheel diameter in inches.
Example
A tire size of 265/70R17 means: 265mm wide, 70% aspect ratio, fits 17-inch wheel.
The Ultimate Tire Resource
Tire Size Calculator
Calculate the exact dimensions of your tires based on tire code
RPM Calculator
Calculate revolutions per mile for any tire size
Speedometer Error Calculator
Calculate the actual speed based on tire size changes
Tire Diameter Calculator
Calculate the overall diameter of your tires
Tire Size Converter
Convert between different tire size formats
Wheel Offset Calculator
Calculate wheel offset and backspacing measurements
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