Tire Size 135/80r12 in inches

The tire size 135/80r12, equivalent to 20.5″x5.3″R12, possesses a diameter of 20.5 inches, a section width of 5.3 inches, and a wheel diameter of 12 inches. This tire is approved to be mounted on 4.0 to 5.5 inches wide wheels, providing a suitable fit for various compact and sub-compact vehicles.

135/80r12 in inches

Feature Metric Inches
Tire Diameter 520.8 20.5″
Section Width 135 5.3″
Rim Height 305 12″
Sidewall Height 108 4.3″
Circumference 1636.1 64.4″
Revolutions 611 per km 984 per mile

How Tall Is A 135/80r12 Tire?

The tire height of the 135/80r12 tire size is the same as the overall diameter, measuring 20.5 inches, or 520.8 millimeters. This height is determined by the combination of the sidewall height, wheel size, and the tire’s top to bottom thickness.

What Is the 135/80r12 Width In Inches?

The tread width of the 135/80r12 tire size, otherwise known as the section width, measures 5.3 inches or 135 millimeters. This width, as observed, impacts the tire’s contact area with the road, directly influencing driving characteristics such as grip, fuel efficiency, and ride comfort.

What Is the 135/80r12 Sidewall Height?

The sidewall height of the 135/80r12 tire size is 4.3 inches, or 108 millimeters. The sidewall height is typically calculated as a percentage (known as the aspect ratio) of the section width. In this case, the aspect ratio is 80, indicating the sidewall height is 80% of the section width.

What Is the 135/80r12 Tire Circumference?

The circumference of the 135/80r12 tire size is about 64.4 inches, or approximately 1636.1 millimeters. This measurement is essential as it influences the speedometer reading and overall vehicle speed. A larger circumference could result in a slower speed reading than actual, while a smaller one could indicate a faster speed.

What Is the 135/80r12 Revolutions Per Mile?

For the 135/80r12 tire size, there are approximately 984 revolutions per mile or 611 per kilometer. This value is essential in determining the speedometer calibration and, thus, the vehicle’s actual speed. More revolutions per mile indicate a smaller tire.

What Is the 135/80r12 Rims Size?

For the 135/80r12 tire size, the rim diameter is 12 inches or 305 millimeters. This rim size is designed to perfectly accommodate the tire, ensuring optimal performance and safety.

Fitment Guide
The 135/80r12 tire size fits a variety of vehicles. Notably, it’s compatible with:

    • DAEWOO Fino (1991 – 2001) and Tico (1991 – 2001)
    • FIAT 500 (1957 – 1975)
    • MAZDA AZ Wagon (1998 – 2000) and Carol (1998 – 2004)
    • MITSUBISHI Minica (2001 – 2002)
    • SUZUKI Alto (1998 – 2009), Twin (2003 – 2005), and Wagon R (1998 – 2000)
    • VAZ 1111 (1990 – 2006)

Replacement Tire Size
Replacement tires have to be within 3% of the total diameter of the existing tires to ensure no substantial change in speedometer readings, safety, or vehicle performance. For 135/80r12, potential replacements should maintain a diameter close to 20.5 inches or 520.8 millimeters.

Our Observation
As we have observed, the 135/80r12 is a compact tire size suited to smaller vehicles. Its balanced dimensions contribute to effective performance, offering excellent stability and fuel efficiency.

However, this tire size might be less ideal for larger vehicles or heavy load conditions due to its relatively smaller tread width and sidewall height. Nevertheless, it serves a wide range of vehicles very well, as proven by its fitment history.

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