275/40R21 tires are in stock now with 18 options spanning premium and performance brands including Continental, Pirelli, Hankook, Nokian, Arroyo, and Falken. Whatever the season or driving style, you'll find summer, all-season, and winter designs at prices from $267 to $600 per tire. Every order ships free, Affirm financing is available, and fast delivery comes from a nationwide network.
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What 275/40R21 tires means
The 275/40R21 size code describes the tire's shape in a standardized way. The first number, 275, is the section width in millimeters (about 10.83 inches across the widest part of the tread). The 40 is the aspect ratio: the sidewall height equals 40% of the width, which works out to roughly 110 mm (about 4.33 inches) tall. The R means radial construction, and 21 is the wheel diameter the tire mounts on, in inches.
Put those together and the overall tire diameter is about 29.66 inches, turning approximately 680 revolutions per mile. Those numbers matter to you directly: overall diameter affects speedometer accuracy and gearing, the relatively short 4.33-inch sidewall gives a firmer, more responsive ride with a distinct large-wheel look, and the wide tread with tight clearance means fitment on your vehicle should be confirmed before you buy.
Vehicles & uses
The 275/40R21 combination pairs a wide tread with a large 21-inch wheel, a fitment commonly found on larger performance-oriented crossovers and SUVs as well as some sport sedans. Several models offered in this size are engineered specifically for SUV applications, while others target sport and touring use. Because the same size can appear on different vehicles, always check your door placard or owner's manual for the correct size and load requirements before ordering.
Brands & options in 275/40R21 tires
On the premium and performance side, Continental tires include the ContiSportContact 6 and the touring-focused ContiPremiumContact 6, plus the SUV-oriented Cross Contact RX. From Pirelli tires, choices range from the P-Zero (PZ4) to the Scorpion Verde All Season.
For performance and touring, Hankook tires offer the Ventus S1 evo4 X K137A and the Ventus S1 evo3 SUV K127C. Nokian tires cover multiple seasons with the all-season Surpass AS01 and the winter Hakkapeliitta R5 SUV. Value-focused options are also available from Arroyo tires and Falken tires. Browse the full tire selection to compare everything side by side.
How to choose
Season: Summer tires prioritize dry and wet grip in warm weather; all-season tires balance year-round usability; winter designs like the Hakkapeliitta family are built for snow, ice, and cold temperatures. Match the type to your climate.
Treadwear & UTQG: The UTQG treadwear grade helps compare expected tread life within a brand's lineup, alongside traction and temperature ratings printed on the sidewall.
Load index & speed rating: The service description that follows the size (for example, 107 with a speed letter) tells you the maximum load and speed capability. Match or exceed the figures your vehicle requires, and note that many 275/40R21 tires carry an XL (extra load) designation.
Warranty: Compare any mileage or workmanship coverage a manufacturer provides for your chosen model.
Frequently Asked Questions
How much do 275/40R21 tires cost?
Current pricing runs from about $267 to $600 per tire, depending on brand, season type, and performance level. Free shipping applies to every order and Affirm financing is available.
What does 275/40R21 mean?
It describes a tire that is 275 mm wide with a sidewall 40% of that width (about 110 mm), built as a radial to fit a 21-inch wheel. The overall diameter is roughly 29.66 inches and it turns about 680 revolutions per mile.
Which brands are available in 275/40R21?
Continental, Pirelli, Hankook, Nokian, Arroyo, and Falken all offer 275/40R21 tires, across summer, all-season, and winter designs.