255/45R20 In Inches

What size tire is 255/45R20 in Inches?

The 255/45R20 equivalent to 29.1x10R20 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
  • 20 inches (508mm) represent the rim diameter or called the wheel diameter that can be mounted on.
Diameter29.1"738 mm
Tread Width10"255 mm
Rim Diameter20"508 mm
Sidewall Height4.5"115 mm
Circumference91.4"2322 mm
Revolutions694"431 mm
tire diameter
Tire Side
Tire Circumference
694 Revs/Mile

How tall is a 255/45R20 tire’s height?

The 255/45R20 has an overall diameter of 29.1 inches or 738 mm tall (measured from the outside edges of the wheel)

How wide is a 255/45R20 tire’s width?

The 255/45R20 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 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 255/45R20 tire sidewall height?

The 255/45R20 has a sidewall height of 4.5 inches or 115 mm tall. It’s measured from the rim to the outer edge of the tire.

What size rim do you need for 255/45R20?

The 255/45R20 tire has a size rim of 20 inches or 508 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How many revolutions for 255/45R20 per mile or kilometer?

The 255/45R20 performs 694 revolutions per mile or 431 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 255/45R20 tire circumference?

The circumference of 255/45R20 is 91.4 inches or 2322 mm.

What’s wider or narrow than 255/45R20 is acceptable?

You can replace the 255/45R20 tires that are within ±3% of the overall tire diameter. In this case, it’s between 28.2 and 30 inches (716mm to 760 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

Tire Size Chart for 20" Wheels:

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

37″ Tire Diameter

39″ Tire Diameter

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