235/40R18 In Inches

What size tire is 235/40R18 in Inches?

The 235/40R18 equivalent to 25.4x9.3R18 in inches, as follow:

  • 25.4 inches (645mm) 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.
Diameter25.4"645 mm
Tread Width9.3"235 mm
Rim Diameter18"457 mm
Sidewall Height3.7"94 mm
Circumference79.8"2027 mm
Revolutions793"493 mm
tire diameter
Tire Side
Tire Circumference
793 Revs/Mile

How tall is a 235/40R18 tire’s height?

The 235/40R18 has an overall diameter of 25.4 inches or 645 mm tall (measured from the outside edges of the wheel)

How wide is a 235/40R18 tire’s width?

The 235/40R18 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 235/40R18 tire sidewall height?

The 235/40R18 has a sidewall height of 3.7 inches or 94 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.

What size rim do you need for 235/40R18?

The 235/40R18 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 235/40R18 per mile or kilometer?

The 235/40R18 performs 793 revolutions per mile or 493 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 235/40R18 tire circumference?

The circumference of 235/40R18 is 79.8 inches or 2027 mm.

What’s wider or narrow than 235/40R18 is acceptable?

You can replace the 235/40R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 24.6 and 26.2 inches (626mm to 664 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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