What is a 285/40R21 tire width?
The 285/40R21 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 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 285/40R21 tire’s height?
The 285/40R21 has an overall diameter of 30 inches or 761 mm tall (measured from the outside edges of the wheel)
What size rim do I need for 285/40R21?
The size rim of a 285/40R21 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 285/40R21 tire sidewall’s height?
The sidewall height of a 285/40R21 is 4.5 inches or 114 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.
What about 285/40R21 tire circumference?
285/40R21 tire has a circumference of 94.2 inches or 2393 mm
How many revolutions for 285/40R21 per mile & kilometer?
The 285/40R21 performs 418 revolutions per kilometer or 673 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 285/40R21 is acceptable?
You can replace the 285/40R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 29.1 and 30.9 inches (738mm to 784 mm). Check our tire size chart here or the tire size calculator tool here to find your size.
