Best 315/40R21 Tires
Browse best 315/40R21 tires with 7 tire models available from $133.99.
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.
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.
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.
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.
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.
Overall Diameter: 30.9"
Tread Width: 12.4"
Wheel Diameter: 21"
Sidewall Height: 5"
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.