185/70R15 in inches

How tall is a 185 70R15 tire?

When converted to inches, the equivalent of a 185/70R15 tire size is 25.2x7.3R15. It means that:

  • height overall (or diameter) is 25.2 inches
  • tread width is 7.3 inches
  • wheel diameter is 15 inches

Learn more

185/70R15 tire size in inches
185/70R15 tire size chart

185/70R15 tire size in inches

185/70R15 Height / overall diameter: 25.2 inches
Height / overall diameter
25.2 inches
185/70R15 Tread width: 7.3 inches
Tread width
7.3 inches
185/70R15 Sidewall: 5.1 inches
Sidewall
5.1 inches
185/70R15 Wheel diameter: 15 inches
Wheel diameter
15 inches
185/70R15 Circumference: 79.1 inches
Circumference
79.1 inches
185/70R15 Revolutions: 801 per mile
Revolutions
801 per mile

185/70R15 — what does it mean?

  • 185 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

185/70R15 tire code
185/70R15 tire code

How to convert 185 70R15 to inches?

First of all, we need to divide 185 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 7.3″. Then, 70% of the 7.3″ will result in 5.1″ 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 25.2″ total tire diameter (or height).

For your convenience, below is a table for 185/70R15 conversion to inches:

Inches Metric
Overall diameter (height) 25.2″ 640 mm
Tread width 7.3″ 185 mm
Wheel diameter 15″ 640 mm
Sidewall height 5.1″ 130 mm
Circumference 79.1″ 2010 mm
Revolutions 801 / ml 498 / km

Alternatives to a 185/70R15 tire

If you're looking to upsize your 185 70R15 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
275/50R15 25.8″ 0.58% 10.8″ 15″
225/60R15 25.6″ 0.39% 8.9″ 15″
205/60R15 24.6″ -0.59% 8.1″ 15″
205/65R15 25.4″ 0.19% 8.1″ 15″
135/90R15 24.6″ -0.59% 5.3″ 15″
155/80R15 24.8″ -0.39% 6.1″ 15″
165/80R15 25.4″ 0.19% 6.5″ 15″
T135/90R15 24.6″ -0.59% 5.3″ 15″
175/75R15 25.4″ 0.19% 6.9″ 15″
185/65R15 24.4″ -0.79% 7.3″ 15″