255/55R18 In Inches

What size tire is 255/55R18 in Inches?

The 255/55R18 equivalent to 29.1x10R18 in inches, as follow:

  • 29.1 inches (738mm) 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.
InchesMetric
Tire Diameter29.1"738 mm
Tread Width10"255 mm
Rim Diameter18"457 mm
Sidewall Height5.5"140 mm
Circumference91.1"2314 mm
Revolutions695 revs/mile432 revs/km
tire diameter
10"
29.1"
Tire Side
Tire Circumference
91.1"
18"
5.5"
695 Revs/Mile

What is a 255/55R18 tire width?

The 255/55R18 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.

What is 255/55R18 tire diameter?

The 255/55R18 has an overall diameter of 29 inches or 737 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 255/55R18?

The size rim of a 255/55R18 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 255/55R18 tire sidewall’s height?

The sidewall height of a 255/55R18 is 5.5 inches or 140 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.

What about 255/55R18 tire circumference?

255/55R18 tire has a circumference of 91.1 inches or 2314 mm

How many revolutions for 255/55R18 per mile & kilometer?

The 255/55R18 performs 432 revolutions per kilometer or 695 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 255/55R18 is acceptable?

You can replace the 255/55R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 28.1 and 29.9 inches (715mm to 759 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


*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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