Best 315/40R21 Tires

Browse best 315/40R21 tires with 7 tire models available from $133.99.

Best 315/40R21 Tire Prices
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Best 315/40R21 High Performance All-Season Tires

High performance all-season tires offer a good balance of responsive handling, dependable year-round traction and good tread life.

(4.7 out of 54.7) from $328.00

Best 315/40R21 High Performance Summer Tires

High performance summer tires offer a nice blend of responsive handling, reliable dry and wet traction, and decent tread life.

(4.5 out of 54.5) from $409.59

Best 315/40R21 Touring All-Season Tires

Touring all-season tires deliver a nice balance of good year-round traction, smooth ride and longer tread life.

(4.8 out of 54.8) from $133.99
(4.6 out of 54.6) from $288.27

Best 315/40R21 Ultra High Performance Summer Tires

Ultra high performance summer tires are focused on sharp handling on dry and wet roads with good ride quality and tread life. Not designed for winter driving.

(4.4 out of 54.4) from $360.03
(4.3 out of 54.3) from $359.00
(4.3 out of 54.3) from $373.24

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
12.4"
30.9"
315/40R21 Tire Side
21 Inch Wheel
Tire Circumference
97"
21"
5"
653 Revs/Mile

Overall Diameter: 30.9"

Tread Width: 12.4"

Wheel Diameter: 21"

Sidewall Height: 5"

Circumference: 97"

Revolutions per Mile: 653

Replacement Tire Sizes for 315/40R21

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