The 175/50R13 tire size is a common choice for compact cars and classic vehicles, offering a balance of performance and efficiency. Understanding this tire size involves breaking down its components and converting its dimensions from metric to imperial units.
Understanding 175/50R13 Tire Size

The tire size 175/50R13 can be broken down as follows:
-
175: This is the tire width in millimeters.
-
50: The aspect ratio, representing the sidewall height as a percentage of the tire width.
-
R: Indicates radial construction.
-
13: The diameter of the wheel in inches.
How to Convert 175/50R13 Into Inches
To convert tire dimensions from metric to imperial units, use the conversion factor of 25.4 mm per inch.
-
Width: 175 mm ÷ 25.4 = 6.89 inches
-
Sidewall Height: 175 mm × 0.50 = 87.5 mm; 87.5 mm ÷ 25.4 = 3.44 inches
-
Overall Diameter: (2 × 87.5 mm) + (13 × 25.4 mm) = 505 mm; 505 mm ÷ 25.4 = 19.88 inches
Detailed Conversion Table

Measurement |
Metric (mm) |
Imperial (inches) |
Width |
175 mm |
6.89 inches |
Sidewall Height |
87.5 mm |
3.44 inches |
Overall Diameter |
505 mm |
19.88 inches |
Quick Conversion Tips
Remember, 1 inch equals 25.4 mm. For quick estimates, divide millimeters by 25.4 to get inches. Common reference points include:
-
200 mm ≈ 7.87 inches
-
150 mm ≈ 5.91 inches
Technical Specifications and Dimensions
Here are the technical specifications for the 175/50R13 tire:
-
Load Index: 72 (maximum load of 355 kg or 783 lbs per tire)
-
Speed Rating: V (up to 240 km/h or 149 mph)
-
Rim Width Range: 5.0 - 6.5 inches
-
Treadwear Rating: 300
-
Traction Grade: A
-
Temperature Resistance: B
Compatible Vehicles for 175/50R13
The 175/50R13 tire size is commonly used on compact and classic vehicles. Here are some examples:
-
Honda Civic (1980-1983): Known for its compact design and efficiency.
-
Mini Cooper (Classic Models): A popular choice for its iconic style and performance.
-
Fiat 500 (Classic Models): Offers a blend of retro charm and practicality.
When considering this tire size, ensure your vehicle's rim width and load requirements are compatible.
Size Comparison and Alternatives
When selecting alternative tire sizes, ensure the overall diameter remains within a 3% variance to maintain vehicle performance and safety. Alternatives include:
-
165/55R13: Offers a slightly narrower profile with similar diameter.
-
185/45R13: Provides a wider stance with minimal diameter change.
FAQ Section
What is the recommended tire pressure for 175/50R13 tires?
The recommended tire pressure for 175/50R13 tires typically ranges from 32 to 35 PSI (220 to 240 kPa). Always consult your vehicle's manual for specific recommendations to ensure optimal safety and performance.
Can I use a different tire size than 175/50R13?
Yes, you can use a different tire size, but ensure the overall diameter remains within a 3% variance. Consider alternatives like 165/55R13 or 185/45R13, and consult a tire professional to ensure compatibility with your vehicle's specifications.
What is the width and height of a 175/50R13 tire?
The width of a 175/50R13 tire is 175 mm (6.89 inches), and the sidewall height is 87.5 mm (3.44 inches). These dimensions contribute to the tire's performance characteristics, including handling and comfort.