255/45R18 In Inches

What size tire is 255/45R18 in Inches?

The 255/45R18 equivalent to 27x10R18 in inches, as follow:

  • 27 inches (687mm) stand for the tire diameter, also referred to as the tire height
  • 10 inches (255mm) 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.
Diameter27"687 mm
Tread Width10"255 mm
Rim Diameter18"457 mm
Sidewall Height4.5"115 mm
Circumference84.8"2154 mm
Revolutions747"464 mm
tire diameter
Tire Side
Tire Circumference
747 Revs/Mile

What is a 255/45R18 tire width?

The 255/45R18 has a width of 10 inches or 255 mm wide. This is the measurement of the tire at its thickest point, the distance between the inner sidewall’s widest point and the outer 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.

How tall is a 255/45R18 tire’s height?

The 255/45R18 has an overall diameter of 27 inches or 687 mm tall (measured from the outside edges of the wheel)

What size rim do I need for 255/45R18?

The size rim of a 255/45R18 tire is 18 inches or 457 mm tall. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How tall is a 255/45R18 tire sidewall’s height?

The sidewall height of a 255/45R18 is 4.5 inches or 115 mm tall. It’s measured from the rim to the outer edge of the tire.

What about 255/45R18 tire circumference?

255/45R18 tire has a circumference of 84.8 inches or 2154 mm

How many revolutions for 255/45R18 per mile & kilometer?

The 255/45R18 performs 464 revolutions per kilometer or 747 revolutions per mile. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer

What’s wider or narrow than 255/45R18 is acceptable?

You can replace the 255/45R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 26.2 and 27.8 inches (666mm to 708 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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