Browse best 325/40R21 tires with 1 tire model available from $338.97.

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Best 325/40R21 Ultra High Performance Summer Tires

Ultra high performance summer tires are designed for agile handling on dry and wet roads with good ride quality and decent tread life.

Continental ContiSportContact 5P

(4.4) from $338.97

325/40R21 Tire Size Fitment

1 vehicle is equipped with 325/40R21 tires as original equipment. Select vehicle model to find best tires that fit.

325/40R21 Tire Size Specifications

325/40R21 is a Metric tire with a section or tread width of 12.8 inches, wheel diameter of 21 inches, and overall diameter of 31.2 inches. 325/40R21 tire has a circumference of 98 inches, making 647 revolutions per mile.

12.8"

31.2"

98"

21"

5.1"

647 Revs/Mile

Overall Diameter: 31.2"

Tread Width: 12.8"

Wheel Diameter: 21"

Sidewall Height: 5.1"

Circumference: 98"

Revolutions per Mile: 647

325/40R21 Tire Size Conversion

325/40R21 in inches is equivalent to 31.2x12.8R21.

Replacement Sizes for 325/40R21 Tires

325/40R21 tire can be replaced with 22 compatible tire sizes. Select optional plus size to see available tire models.