195/45R13 Tire Size in Inches and Millimeters

Understanding the 195/45R13 Tire Size

The tire size 195/45R13 is a common specification for certain compact cars and classic vehicles. Here's a breakdown of what each part of this designation means:

• 195 - This is the tire's width in millimeters. It indicates that the tire is 195 mm wide.

• 45 - This is the aspect ratio, which is the height of the sidewall expressed as a percentage of the tire's width. In this case, the sidewall height is 45% of 195 mm.

• R - This denotes radial construction, which is the standard for most modern tires.

• 13 - This is the diameter of the wheel in inches that the tire is designed to fit.

How to Convert 195/45R13 Into Inches

Converting the 195/45R13 tire size from metric to imperial measurements involves a few calculations:

Width Conversion

The width of the tire is 195 mm. To convert this to inches:

Width in inches = 195 mm ÷ 25.4 = 7.68 inches

Sidewall Height Calculation

The sidewall height is 45% of the tire's width:

Sidewall height = 195 mm × 0.45 = 87.75 mm

Convert to inches:

Sidewall height in inches = 87.75 mm ÷ 25.4 = 3.45 inches

Overall Diameter Calculation

The overall diameter of the tire can be calculated as follows:

Overall diameter = (2 × Sidewall height) + Wheel diameter

Overall diameter in inches = (2 × 3.45) + 13 = 19.9 inches

Detailed Conversion Table

Quick Conversion Tips

• 1 inch = 25.4 mm

• For quick estimates, remember that 195 mm is approximately 7.7 inches wide.

• Sidewall height can be quickly estimated by multiplying the width by the aspect ratio and converting to inches.

Technical Specifications and Dimensions

• Load Index: Typically ranges from 75 to 82, indicating a load capacity of 853 to 1,047 lbs per tire.

• Speed Rating: Usually T (118 mph) or H (130 mph).

• Recommended Tire Pressure: 32-35 PSI (220-240 kPa).

• Tread Depth: Generally around 8-10/32 inches.

Compatible Vehicles for 195/45R13

The 195/45R13 tire size is commonly found on compact cars and certain classic vehicles. Here are some examples:

• Volkswagen Golf Mk1 (1974-1983)

• Ford Fiesta (1976-1983)

• Honda Civic (1972-1979)

These tires are suitable for vehicles designed to accommodate a smaller wheel diameter and lower profile tire, enhancing handling and performance.

Size Comparison and Alternatives

When considering alternative tire sizes, it's important to stay within a 3% variance in overall diameter to maintain speedometer accuracy and vehicle handling. Here are some alternatives:

• 175/50R13 - Offers a slightly narrower width and similar diameter.

• 205/40R13 - Provides a wider stance with a similar overall diameter.

FAQ Section

What is the recommended tire pressure for 195/45R13 tires?

The recommended tire pressure for 195/45R13 tires typically ranges from 32 to 35 PSI (220 to 240 kPa). Maintaining the correct tire pressure is crucial for safety, fuel efficiency, and optimal performance.

Can I use a different tire size than 195/45R13?

Yes, you can use a different tire size, but it's important to ensure that the overall diameter remains within a 3% variance to avoid affecting the vehicle's handling and speedometer accuracy. Common alternatives include 175/50R13 and 205/40R13.

What is the width and height of a 195/45R13 tire?

The width of a 195/45R13 tire is 195 mm (7.68 inches), and the sidewall height is 87.75 mm (3.45 inches). These dimensions contribute to the tire's overall diameter of 505.9 mm (19.9 inches).

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