285/45R21 In Inches

What size tire is 285/45R21 in Inches?

The 285/45R21 equivalent to 31.1x11.2R21 in inches, as follow:

  • 31.1 inches (790mm) stand for the tire diameter, also referred to as the tire height
  • 11.2 inches (285mm) is the tire width, this may also know as the section width
  • 21 inches (533mm) represent the rim diameter or called the wheel diameter that can be mounted on.
Diameter31.1"790 mm
Tread Width11.2"285 mm
Rim Diameter21"533 mm
Sidewall Height5"128 mm
Circumference97.7"2482 mm
Revolutions649"403 mm
tire diameter
Tire Side
Tire Circumference
649 Revs/Mile

How big is a 285/45R21 tire’s height?

The overall diameter of a 285/45R21 is 31.1 inches or 789 mm tall (measurement of a tire’s outside diameter through its exact center when inflated with no load.

How wide is a 285/45R21 tire’s width?

The 285/45R21 has a width of 11.2 inches or 285 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 285/45R21 tire sidewall height?

The 285/45R21 has a sidewall height of 5 inches or 128 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 285/45R21?

The 285/45R21 tire has a size rim of 21 inches or 533 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How many revolutions for 285/45R21 per mile or kilometer?

The 285/45R21 performs 649 revolutions per mile or 403 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 285/45R21 tire circumference?

The circumference of 285/45R21 is 97.7 inches or 2482 mm.

What’s wider or narrow than 285/45R21 is acceptable?

You can replace the 285/45R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 30.2 and 32 inches (765mm to 813 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

Share on:

Tire Size Chart for 21" Wheels:

26″ Tire Diameter

27″ Tire Diameter

28″ Tire Diameter

29″ Tire Diameter

30″ Tire Diameter

31″ Tire Diameter

32″ Tire Diameter

Leave a Comment