Tire Size 145/70r12 in inches

The tire size 145/70r12, which is equivalent to 20×5.7R12, has a diameter of 20 inches, a section width of 5.7 inches, a wheel diameter of 12 inches, and is approved to be mounted on 4.5-5.5 inches wide wheels. This compact size typically fits smaller city cars, offering good stability and handling characteristics.

145/70r12 in inches

Feature Metric Inches
Tire Diameter 507.8 20″
Section Width 145 5.7″
Rim Height 305 12″
Sidewall Height 101.5 4″
Circumference 1595.3 62.8″
Revolutions 626 per km 1009 per mile

How Tall Is A 145/70r12 Tire?

The tire height of the 145/70r12 tire size is 20 inches or 507.8 millimeters. This height refers to the overall diameter of the tire, a measurement that stretches from the topmost point of the tire’s surface to the bottommost point when mounted and inflated on its rim.

What Is the 145/70r12 Width In Inches?

The tread width of the 145/70r12 tire size is 5.7 inches or 145 millimeters. This is the width of the tire’s contact patch, the part of the tire that touches and interacts with the road surface, and it can impact various aspects such as handling, traction, and braking performance.

What Is the 145/70r12 Sidewall Height?

The sidewall height of the 145/70r12 tire size is 4 inches or 101.5 millimeters. The sidewall height, also known as the tire’s aspect ratio, is the vertical distance from the edge of the rim to the top of the tire tread and affects ride quality and road noise.

What Is the 145/70r12 Tire Circumference?

The circumference of the 145/70r12 tire size is approximately 62.8 inches or 1595.3 millimeters. This measurement, also known as the tire’s “rollout,” influences the speedometer reading and odometer count on the vehicle.

What Is the 145/70r12 Revolutions Per Mile?

For the 145/70r12 tire size, there are approximately 1009 revolutions per mile or 626 revolutions per kilometer. The number of revolutions a tire makes per mile can affect fuel efficiency, ride comfort, and how accurately your speedometer reads.

What Is the 145/70r12 Rims Size?

For the 145/70r12 tire size, the rim diameter is 12 inches or 305 millimeters. This is an important specification when purchasing new tires, ensuring the tire will correctly fit on the wheel.

Fitment Guide
The 145/70r12 tire size can fit a variety of vehicles, including:

  • Baojun: E100 (2017 – 2020), E200 (2019 – 2020), E300 (2020 – 2020)
  • Chery: QQ Ice Cream (2022 – 2022)
  • Daihatsu: Cuore (1986 – 1998), Leeza (1986 – 1993), Mira (1990 – 2001), Opti (1992 – 2002)
  • Dongfeng: Glory MINI (2022 – 2023)
  • Honda: Today (1988 – 1997)
  • Maruti: 800 (1983 – 2012)
  • MINI: Cooper (1990 – 2000)
  • Mitsubishi: Minica (1989 – 1998), Minica Toppo (1990 – 1998)
  • Perodua: Kancil (1994 – 2009)
  • Subaru: Pleo (1998 – 2008), Pleo Nesta (2000 – 2001), Rex (1989 – 1992), Vivio (1992 – 1999)
  • Suzuki: Cervo (1988 – 1990)
  • Zotye Jiangnan: T11 (2015 – 2015), TT (2010 – 2010)

Replacement Tire Size
Replacement tires have to be within 3% of the diameter of the original tires to maintain the proper functioning of the vehicle’s speedometer, traction control, and other computer-controlled systems.

Tire Size Diameter Rim
135/80R12 20.5″ (+2.4%) 12″
155/70R12 20.5″ (+2.4%) 12″
125/80R12 19.9″ (-0.5%) 12″
165/60R12 19.8″ (-1%) 12″

Our Observation
With its compact dimensions, the 145/70r12 tire size is a popular choice for smaller, urban vehicles, often seen on brands like Baojun, Chery, and Daihatsu. The low profile of the sidewall height contributes to improved handling and stability, while the tread width ensures ample surface contact for reliable traction.

However, this tire size may not be suitable for larger vehicles or rough terrains. Its particular characteristics, such as circumference and revolutions per mile, suggest optimal performance in city driving conditions where frequent starting, stopping, and turning are common.

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