275/50R21 In Inches

What size tire is 275/50R21 in Inches?

The 275/50R21 equivalent to 31.8x10.8R21 in inches, as follow:

  • 31.8 inches (808mm) stand for the tire diameter, also referred to as the tire height
  • 10.8 inches (275mm) 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.
InchesMetric
Tire Diameter31.8"808 mm
Tread Width10.8"275 mm
Rim Diameter21"533 mm
Sidewall Height5.4"138 mm
Circumference100.2"2545 mm
Revolutions632 revs/mile393 revs/km
tire diameter
10.8"
31.8"
Tire Side
Tire Circumference
100.2"
21"
5.4"
632 Revs/Mile

What is a 275/50R21 tire width?

The 275/50R21 has a width of 10.8 inches or 275 mm wide. This is the measurement of the tire at its thickest point, the distance between the inner sidewall’s widest point and the outer 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 275/50R21 tire diameter?

The 275/50R21 has an overall diameter of 31.9 inches or 809 mm tall (Measurement of a tire’s outside diameter through its exact center when inflated with no load.)

What size rim do I need for 275/50R21?

The size rim of a 275/50R21 tire is 21 inches or 533 mm tall. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How tall is a 275/50R21 tire sidewall’s height?

The sidewall height of a 275/50R21 is 5.4 inches or 138 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.

What about 275/50R21 tire circumference?

275/50R21 tire has a circumference of 100.2 inches or 2545 mm

How many revolutions for 275/50R21 per mile & kilometer?

The 275/50R21 performs 393 revolutions per kilometer or 632 revolutions per mile. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer

What’s wider or narrow than 275/50R21 is acceptable?

You can replace the 275/50R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 30.9 and 32.9 inches (785mm to 833 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

*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.



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


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