255/65R18 In Inches

What size tire is 255/65R18 in Inches?

The 255/65R18 equivalent to 31.1x10R18 in inches, as follow:

  • 31.1 inches (789mm) 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.
Diameter31.1"789 mm
Tread Width10"255 mm
Rim Diameter18"457 mm
Sidewall Height6.5"166 mm
Circumference97.7"2482 mm
Revolutions649"403 mm
tire diameter
Tire Side
Tire Circumference
649 Revs/Mile

What is a 255/65R18 tire width?

The 255/65R18 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 big is a 255/65R18 tire’s height?

The overall diameter of a 255/65R18 is 31.1 inches or 789 mm tall (measurement of a tire’s outside diameter through its exact center when inflated with no load.

What size rim do I need for 255/65R18?

The size rim of a 255/65R18 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 255/65R18 tire sidewall’s height?

The sidewall height of a 255/65R18 is 6.5 inches or 166 mm tall. It’s measured from the rim to the outer edge of the tire.

What about 255/65R18 tire circumference?

255/65R18 tire has a circumference of 97.7 inches or 2482 mm

How many revolutions for 255/65R18 per mile & kilometer?

The 255/65R18 performs 403 revolutions per kilometer or 649 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 255/65R18 is acceptable?

You can replace the 255/65R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 30.2 and 32 inches (765mm to 813 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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