P285/70R15 — what does it mean?
- P means "passenger car"
- 285 stands for tread width in millimeters
- 70 is an aspect ration between the tread width and the sidewall in percents
- R means that the tire has a radial construction
- 15 is a wheel diameter (or rim) in inches
How to convert P285 70R15 to inches?
First of all, we need to divide 285 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 11.2″. Then, 70% of the 11.2″ will result in 7.9″ sidewall.
To get the total height or tire diameter, we need to sum the 15″ rim diameter with two of the sidewall heights. It will result in a 30.8″ total tire diameter (or height).
For your convenience, below is a table for P285/70R15 conversion to inches:
|Overall diameter (height)||30.8″||782 mm|
|Tread width||11.2″||285 mm|
|Wheel diameter||15″||782 mm|
|Sidewall height||7.9″||200 mm|
|Revolutions||655 / ml||407 / km|
Alternatives to a P285/70R15 tire
If you're looking to upsize your P285 70R15 tires, try to stay within 3% deviation of an overall diameter for safety reasons.
|Tire||Tire diameter||Width||Wheel Size|