235/30R18 In Inches

What size tire is 235/30R18 in Inches?

The 235/30R18 equivalent to 23.5x9.3R18 in inches, as follow:

  • 23.5 inches (598mm) stand for the tire diameter, also referred to as the tire height
  • 9.3 inches (235mm) 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 Diameter23.5"598 mm
Tread Width9.3"235 mm
Rim Diameter18"457 mm
Sidewall Height2.8"71 mm
Circumference74.1"1882 mm
Revolutions855 revs/mile531 revs/km
tire diameter
9.3"
23.5"
Tire Side
Tire Circumference
74.1"
18"
2.8"
855 Revs/Mile

How big is a 235/30R18 tire’s height?

The overall diameter of a 235/30R18 is 23.6 inches or 599 mm tall (measurement of a tire’s outside diameter through its exact center when inflated with no load.

How wide is a 235/30R18 tire’s width?

The 235/30R18 has a width of 9.3 inches or 235 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 235/30R18 tire sidewall height?

The 235/30R18 has a sidewall height of 2.8 inches or 71 mm tall. It’s measured from the rim to the outer edge of the tire.

What size rim do you need for 235/30R18?

The 235/30R18 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 235/30R18 per mile or kilometer?

The 235/30R18 performs 855 revolutions per mile or 531 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 235/30R18 tire circumference?

The circumference of 235/30R18 is 74.1 inches or 1882 mm.

What’s wider or narrow than 235/30R18 is acceptable?

You can replace the 235/30R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 22.9 and 24.3 inches (581mm to 617 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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