Best 255/40R21 Tires
Browse best 255/40R21 tires with 11 tire models available from $173.99.
Best 255/40R21 High Performance All-Season Tires
High performance all-season tires offer a balanced blend of good handling, year-round traction and treadlife.
Best 255/40R21 Touring All-Season Tires
Touring all-season tires provide unparallel balance of good year-round traction, comfortable ride and longer tread life.
Best 255/40R21 Ultra High Performance All-Season Tires
Ultra high performance all-season tires provide very good performance on dry and wet roads, as well as adequate winter traction.
Best 255/40R21 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.
255/40R21 Tire Size Fitment
9 vehicles are equipped with 255/40R21 tires as original equipment. Select vehicle model to find best tires that fit.
255/40R21 Tire Size Specifications
255/40R21 is a Metric tire with a section or tread width of 10 inches, wheel diameter of 21 inches, and overall diameter of 29 inches. 255/40R21 tire has a circumference of 91.1 inches, making 695 revolutions per mile.
Overall Diameter: 29"
Tread Width: 10"
Wheel Diameter: 21"
Sidewall Height: 4"
Revolutions per Mile: 695
255/40R21 Tire Size Conversion
255/40R21 in inches is equivalent to 29x10R21.
Replacement Sizes for 255/40R21 Tires
255/40R21 tire can be replaced with 26 compatible tire sizes. Select optional plus size to see available tire models.