245/70R19.5 Tire Size in Inches & Millimeters

Tire size “245/70R19.5” indicates your vehicle’s specifications based on tire width, aspect ratio, height, tire construction, diameter, radial and inches. These tire size numbers represent our tire sizes in both Metric (in millimeters) and Imperial (in inches) units of measurement to help find the correct tire size for your vehicle.

To convert tire size 245/70R19.5 to inches, you must know what these numbers represent.

So let us know 245/70R19.5 in simple words:

First number “245” indicates the tire’s width in millimeters.
Second number “70” refers to the aspect ratio, which is the height of the tire’s sidewall as a percentage of its width.
Third number “R19.5” refers to a tire that is designed to fit a 19.5-inch diameter rim.

Therefore, when converting the tire size 245/70R19.5 to inches, it can be concluded that the width of the tire will be approximately 9.6 inches ( 245 mm= 9.6 in), and the sidewall height will be approximately 6.8 inches (70% of 9.6 inches = 6.8 inches).

How to convert 245/70R19.5 into Inches (imperial)?

To convert tire size 245/70R19.5 to inches (Imperial) –

1. Width conversion: To convert it to inches, you can use a conversion factor of approximately 25.4 millimeters per inch.

  • 245 millimeters/25.4 = approximately 9.6 inches
    So, the width of the tire is approximately 9.6 inches.

2. Aspect Ratio Calculation: To calculate sidewall height in inches, you can use the tire width (from Step 1) and the aspect ratio:

  • Sidewall Height = Width (in inches) * Aspect Ratio / 100
  • Sidewall Height = 9.6 inches * 70/100 = approximately 6.8 inches
    So, the tire sidewall height is approximately 6.8 inches.

3. Rim Diameter: The “R” in the tire size stands for “radial construction” and the last number “19.5” indicates the rim diameter in inches. In this case, it’s already in inches.
So, the converted tire size “245/70R19.5” in inches (imperial) is approximately:

  • Width: 9.6 inches
  • Sidewall Height: 6.8 inches
  • Rim Diameter: 19.5 inches

How to convert 245/70R19.5 into Millimeters (metric)?

To convert the tire size 245/70R19.5 into millimeters (metric) –

1. Width Conversion: The first number in the tire size, “245“, represents the tire’s width in millimeters. Since it’s already in millimeters, there’s no need for conversion.

  • Width: 245millimeters

2. Aspect Ratio Calculation: The second number “70” is the aspect ratio, representing the tire’s sidewall height as a percentage of its width. To calculate the sidewall height in millimeters, you can use the tire’s width (from step 1) and the aspect ratio:

  • Sidewall height = Width (in millimeters) * Aspect Ratio / 100
  • Sidewall height = 245 millimeters * 70 / 100 = 172 mm millimeters
    So, the tire’s sidewall height is approximately 172 mm millimeters.

3. Rim Diameter: The “R” in the tire size stands for “radial construction” and the last number, “19.5” indicates the rim diameter in inches. To convert this to millimeters, you can use the conversion factor of approximately 25.4 millimeters per inch.

  • Rim diameter = 19.5 inches * 25.4 millimeters per inch = 495 mm millimeters
    So, the rim diameter is approximately 495 mm millimeters.

So, the converted tire size “245/70R19.5” in millimeters (metric) is approximately:

  • Width: 245 mm
  • Sidewall Height: 172 mm
  • Rim Diameter: 495 mm

Alternate Tire Size of 245/70R19.5 For replacement

Tire Size Overall Diameter Difference
255/60R20 32″ (814 mm) -3%
305/50R20 32″ (814 mm) -3%
285/45R22 32.1″ (815 mm) -2.9%
315/45R21 32.2″ (817 mm) -2.6%
325/40R22 32.2″ (819 mm) -2.4%
285/55R20 32.4″ (822 mm) -2%
315/50R20 32.4″ (824 mm) -1.8%
265/50R22 32.5″ (825 mm) -1.7%
295/45R22 32.5″ (825 mm) -1.7%
265/60R20 32.5″ (826 mm) -1.5%
295/55R20 32.8″ (832 mm) -0.8%
305/45R22 32.8″ (833 mm) -0.7%
325/50R20 32.8″ (834 mm) -0.6%
275/50R22 32.9″ (835 mm) -0.5%
275/60R20 33″ (838 mm) -0.1%
355/40R22 33.2″ (843 mm) 0.5%
315/45R22 33.2″ (843 mm) 0.5%
305/55R20 33.2″ (844 mm) 0.6%
285/50R22 33.3″ (845 mm) 0.7%
375/45R20 33.3″ (846 mm) 0.8%
285/60R20 33.5″ (850 mm) 1.3%
325/45R22 33.5″ (851 mm) 1.4%
295/50R22 33.7″ (855 mm) 1.9%
275/55R22 33.9″ (861 mm) 2.6%
295/60R20 33.9″ (862 mm) 2.7%
355/50R20 34″ (864 mm) 3%

Leave a Comment