225/65R18 In Inches

What size tire is 225/65R18 in Inches?

The 225/65R18 equivalent to 29.5x8.9R18 in inches, as follow:

  • 29.5 inches (750mm) stand for the tire diameter, also referred to as the tire height
  • 8.9 inches (225mm) 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 Diameter29.5"750 mm
Tread Width8.9"225 mm
Rim Diameter18"457 mm
Sidewall Height5.8"146 mm
Circumference92.7"2355 mm
Revolutions684 revs/mile425 revs/km
tire diameter
8.9"
29.5"
Tire Side
Tire Circumference
92.7"
18"
5.8"
684 Revs/Mile

What is 225/65R18 tire diameter?

The 225/65R18 has an overall diameter of 29.5 inches or 749 mm tall (Measurement of a tire’s outside diameter through its exact center when inflated with no load.)

How wide is a 225/65R18 tire’s width?

The 225/65R18 has a width of 8.9 inches or 225 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 225/65R18 tire sidewall height?

The 225/65R18 has a sidewall height of 5.7 inches or 146 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 225/65R18?

The 225/65R18 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 225/65R18 per mile or kilometer?

The 225/65R18 performs 684 revolutions per mile or 425 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 225/65R18 tire circumference?

The circumference of 225/65R18 is 92.7 inches or 2355 mm.

What’s wider or narrow than 225/65R18 is acceptable?

You can replace the 225/65R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 28.6 and 30.4 inches (727mm to 771 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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