Best 315/40R21 Tires

Browse best 315/40R21 tires with 7 tire models available from $173.99.

Buy 315/40R21 Tires at Lowest Prices
TireRack from $382.18
Discount Tire from $388.00
Priority Tire from $173.99
Simple Tire from $191.96

Best 315/40R21 High Performance All-Season Tires

High performance all-season tires offer a balanced blend of good handling, year-round traction and treadlife.

(4.7 out of 54.7) from $364.99

Best 315/40R21 High Performance Summer Tires

High performance summer tires offer a perfect blend of good handling, dry and wet traction and decent tread wear.

(4.5 out of 54.5) from $470.96

Best 315/40R21 Touring All-Season Tires

Touring all-season tires provide unparallel balance of good year-round traction, comfortable ride and longer tread life.

(4.8 out of 54.8) from $173.99
(4.6 out of 54.6) from $332.96

Best 315/40R21 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.

(4.4 out of 54.4) from $323.99
(4.3 out of 54.3) from $387.34
(4.3 out of 54.3) from $294.99

315/40R21 Tire Size Fitment

10 vehicles are equipped with 315/40R21 tires as original equipment. Select vehicle model to find best tires that fit.

315/40R21 Tire Size Specifications

315/40R21 is a Metric tire with a section or tread width of 12.4 inches, wheel diameter of 21 inches, and overall diameter of 30.9 inches. 315/40R21 tire has a circumference of 97 inches, making 653 revolutions per mile.

315/40R21 Section Width
315/40R21 Tire Side
Tire Circumference
653 Revs/Mile

Overall Diameter: 30.9"

Tread Width: 12.4"

Wheel Diameter: 21"

Sidewall Height: 5"

Circumference: 97"

Revolutions per Mile: 653

315/40R21 Tire Size Conversion

315/40R21 in inches is equivalent to 30.9x12.4R21.

Replacement Sizes for 315/40R21 Tires

315/40R21 tire can be replaced with 21 compatible tire sizes. Select optional plus size to see available tire models.

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