145/70R12 In Inches

What size tire is 145/70R12 in Inches?

The 145/70R12 equivalent to 20x5.7R12 in inches, as follow:

  • 20 inches (508mm) stand for the tire diameter, also referred to as the tire height
  • 5.7 inches (145mm) is the tire width, this may also know as the section width
  • 12 inches (305mm) represent the rim diameter or called the wheel diameter that can be mounted on.
InchesMetric
Tire Diameter20"508 mm
Tread Width5.7"145 mm
Rim Diameter12"305 mm
Sidewall Height4"102 mm
Circumference62.8"1595 mm
Revolutions1009 revs/mile627 revs/km
tire diameter
5.7"
20"
Tire Side
Tire Circumference
62.8"
12"
4"
1009 Revs/Mile

How tall is a 145/70R12 tire’s height?

The 145/70R12 has an overall diameter of 20 inches or 509 mm tall (measured from the outside edges of the wheel)

How wide is a 145/70R12 tire’s width?

The 145/70R12 has a width of 5.7 inches or 145 mm wide. This is the measurement of the tire at its thickest point, the distance between the outer sidewall’s widest point and the inner sidewall’s widest point. This physical width of the tire can change if the tire is mounted on a wheel slightly wider or narrower than the size indicated by the rim width.

What is a 145/70R12 tire sidewall height?

The 145/70R12 has a sidewall height of 4 inches or 102 mm tall. It’s measured from the rim to the outer edge of the tire.

What size rim do you need for 145/70R12?

The 145/70R12 tire has a size rim of 12 inches or 305 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How many revolutions for 145/70R12 per mile or kilometer?

The 145/70R12 performs 1009 revolutions per mile or 627 revolutions per kilometer. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer

How about 145/70R12 tire circumference?

The circumference of 145/70R12 is 62.8 inches or 1595 mm.

What’s wider or narrow than 145/70R12 is acceptable?

You can replace the 145/70R12 tires that are within ±3% of the overall tire diameter. In this case, it’s between 19.4 and 20.6 inches (494mm to 524 mm). Check our tire size chart here or the tire size calculator tool here to find your size.


Tire Size Chart for 12" Wheels:

19" Tire Diameter

20" Tire Diameter

21" Tire Diameter

*Disclaimer: The information provided on the tire size is for general informational purposes only. We recommend that you consult a certified tire specialist or National Highway Traffic Safety Administration (NHTSA) sets specific guidelines for tires used on vehicles.


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Jamie Hicks

Sullivan Kane

Tire Technician at TireSizesCalculator

Sullivan is a Tire Technician specializing in tire repair at TireSizesCalculator. With over 6 years of experience in the industry, Sullivan has become an expert in tire repair, maintenance & installation.


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