325/40R21 in Inches

325/40R21 tire size conversion to inches with detailed visualization of tire height, width, diameter, rim size and more.

What is 325/40R21 in inches?

When we convert 325/40R21 to inches, it is equivalent to 31.2x12.8R21. Let us break down the tire size dimensions for better understanding. 12.8 inches or 325 mm stand for section width, or width of the tire tread. 31.2 inches or 793 mm represent the overall diameter of the tire, or tire height. 21 inches is the rim diameter, or the diameter of the wheel the tire can be mounted on.

325/40R21 Section Width
325/40R21 Tire Side
Tire Circumference
647 Revs/Mile
Metric Inches
Overall Diameter 793 mm 31.2"
Tread Width 325 mm 12.8"
Rim Diameter 533 mm 21"
Sidewall Height 130 mm 5.1"
Circumference 2490 mm 98"
Revolutions 402 per km 647 per mile
Best Prices on 325/40R21 Tires

What is 325/40R21 tire width?

325/40R21 tire has a width of 12.8 inches or 325 mm that reflects the measurement of tire's width from its inner sidewall to its outer sidewall at the widest point (excluding decorations, protective ribs or raised letters). Tire width is also called tread width, section width or cross section width. Tire width should be measured without any load placed upon the tire after it has been properly inflated and mounted on its industry assigned measuring rim.

What is 325/40R21 tire height?

325/40R21 tire has an overall diameter of 31.2 inches or 793 mm that represents the outer diameter of the tire or tire height.

What is 325/40R21 tire sidewall height?

325/40R21 tire has a sidewall height of 5.1 inches or 130 mm which is the measurement of tire sidewall from the wheel rim to the top of tire tread. Tire sidewall height or "profile" depends on aspect ratio - lower aspect ratio means lower tire profile.

What is 325/40R21 rim diameter?

Rim or wheel diameter is generally measured in inches, representing the size of the wheel the tire can be mounted on. 325/40R21 tire can be mounted on 21 inch wheels.

What is 325/40R21 tire circumference?

325/40R21 tire has a circumference of 98 inches or 2490 mm that represents the outer perimeter of the tire.

How many revolutions 325/40R21 tire makes?

Tire revolutions indicate the number of times a tire revolves while it covers the distance of a mile or a kilometer. 325/40R21 tire completes 647 revolutions per mile or 402 revolutions per kilometer.

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