What is a 325/30R21 tire width?
The 325/30R21 has a width of 12.8 inches or 325 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 325/30R21 tire diameter?
The 325/30R21 has an overall diameter of 28.7 inches or 729 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 325/30R21?
The size rim of a 325/30R21 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 325/30R21 tire sidewall’s height?
The sidewall height of a 325/30R21 is 3.9 inches or 98 mm tall. It’s measured from the rim to the outer edge of the tire.
What about 325/30R21 tire circumference?
325/30R21 tire has a circumference of 90.2 inches or 2291 mm
How many revolutions for 325/30R21 per mile & kilometer?
The 325/30R21 performs 436 revolutions per kilometer or 702 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 325/30R21 is acceptable?
You can replace the 325/30R21 tires that are within ±3% of the overall tire diameter. In this case, it’s between 27.8 and 29.6 inches (707mm to 751 mm). Check our tire size chart here or the tire size calculator tool here to find your size.

