285/55R18 In Inches

What size tire is 285/55R18 in Inches?

The 285/55R18 equivalent to 30.4x11.2R18 in inches, as follow:

  • 30.4 inches (771mm) stand for the tire diameter, also referred to as the tire height
  • 11.2 inches (285mm) is the tire width, this may also know as the section width
  • 18 inches (457mm) represent the rim diameter or called the wheel diameter that can be mounted on.
Diameter30.4"771 mm
Tread Width11.2"285 mm
Rim Diameter18"457 mm
Sidewall Height6.2"157 mm
Circumference95.5"2426 mm
Revolutions663"412 mm
tire diameter
Tire Side
Tire Circumference
663 Revs/Mile

What is 285/55R18 tire diameter?

The 285/55R18 has an overall diameter of 30.4 inches or 771 mm tall (Measurement of a tire’s outside diameter through its exact center when inflated with no load.)

How wide is a 285/55R18 tire’s width?

The 285/55R18 has a width of 11.2 inches or 285 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 285/55R18 tire sidewall height?

The 285/55R18 has a sidewall height of 6.2 inches or 157 mm tall. It’s measured from the rim to the outer edge of the tire.

What size rim do you need for 285/55R18?

The 285/55R18 tire has a size rim of 18 inches or 457 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How many revolutions for 285/55R18 per mile or kilometer?

The 285/55R18 performs 663 revolutions per mile or 412 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 285/55R18 tire circumference?

The circumference of 285/55R18 is 95.5 inches or 2426 mm.

What’s wider or narrow than 285/55R18 is acceptable?

You can replace the 285/55R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 29.5 and 31.3 inches (748mm to 794 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

Tire Size Chart for 18" Wheels:

23″ Tire Diameter

24″ Tire Diameter

25″ Tire Diameter

26″ Tire Diameter

27″ Tire Diameter

28″ Tire Diameter

29″ Tire Diameter

30″ Tire Diameter

31″ Tire Diameter

32″ Tire Diameter

33″ Tire Diameter

34″ Tire Diameter

35″ Tire Diameter

36″ Tire Diameter

38″ Tire Diameter

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