What is a 275/40R21 tire width?
The 275/40R21 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.
How tall is a 275/40R21 tire’s height?
The 275/40R21 has an overall diameter of 29.6 inches or 753 mm tall (measured from the outside edges of the wheel)
What size rim do I need for 275/40R21?
The size rim of a 275/40R21 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 275/40R21 tire sidewall’s height?
The sidewall height of a 275/40R21 is 4.3 inches or 110 mm tall. It’s measured from the rim to the outer edge of the tire.
What about 275/40R21 tire circumference?
275/40R21 tire has a circumference of 93 inches or 2362 mm
How many revolutions for 275/40R21 per mile & kilometer?
The 275/40R21 performs 423 revolutions per kilometer or 681 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 275/40R21 is acceptable?
You can replace the 275/40R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 28.7 and 30.5 inches (730mm to 776 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

