285/45R21 tires are in stock now with 17 options spanning brands like Continental, Hankook, Pirelli, Nokian, Lexani and Accelera. Every order ships free, Affirm financing is available at checkout, and fast delivery comes from a nationwide network. Whether you need summer grip, all-season versatility or a dedicated winter tire, this page brings together the full range in one place.
Shop 285/45R21 Tires In Stock
Showing 17 in stock.
What 285/45R21 tires means
The size code breaks down into precise measurements. The 285 is the section width in millimeters (about 11.22 inches) across the widest point of the tread. The 45 is the aspect ratio, meaning the sidewall height is 45% of the section width — that works out to 128.2 mm, or roughly 5.05 inches of sidewall. The R indicates radial construction, and the 21 is the wheel diameter in inches.
Add two sidewalls to the 21-inch rim and you get an overall tire diameter of about 31.1 inches, which turns roughly 649 revolutions per mile. Those numbers matter because a tire that matches your factory diameter keeps your speedometer and odometer accurate, maintains proper clearance inside the wheel well, and preserves the ride quality your vehicle was engineered for. A shorter sidewall like this one leans toward responsive handling.
Vehicles & uses
A 285/45R21 is a wide, large-diameter fitment commonly found on performance-oriented SUVs and crossovers as well as some sport-tuned larger vehicles. Many of the models offered here carry SUV-specific designations, reflecting the size's popularity on heavier, taller vehicles that still want on-road manners. Always confirm the size against your door-jamb placard or owner's manual before buying, since the correct fitment depends on your specific vehicle.
Brands & options in 285/45R21 tires
On the premium end, Continental offers several choices including the ContiSportContact 6, the ContiPremiumContact 6, the ContiSportContact 5, and the quieter CrossContact LX Sport with ContiSilent. Pirelli brings the Scorpion Zero All Season, and Nokian offers the winter-focused Hakkapeliitta R5 SUV.
For performance and touring, Hankook options include the Ventus S1 evo3 SUV, the iON evo AS SUV, and the Dynapro HP2 Plus. On the value side, consider the Lexani LX-TWENTY from Lexani and the Iota ST68 from Accelera. Browse the complete tire selection to compare.
How to choose
Start with season. Summer tires prioritize dry and wet grip in warm weather; all-season tires balance year-round usability; and winter tires are built for cold, snow and ice. Next, check the UTQG treadwear grade — a higher number generally suggests longer expected tread life, useful when comparing similar tires. The load index and speed rating (the number and letter after the size, such as 113Y or 113H) tell you the tire's weight capacity and maximum rated speed; match or exceed what your vehicle requires. Finally, review each tire's mileage warranty, which varies by model and manufacturer.
Frequently Asked Questions
What does 285/45R21 mean?
It's a tire size: 285 mm section width, a 45% aspect ratio giving a sidewall about 128.2 mm (5.05 in) tall, radial construction, and a 21-inch wheel diameter. The overall tire is about 31.1 inches in diameter and turns roughly 649 revolutions per mile.
How much do 285/45R21 tires cost?
Prices currently range from about $169.14 to $692.51 depending on brand, model and performance category. Free shipping applies to every order, and Affirm financing is available.
Which brands are available in this size?
There are 17 options in stock across Continental, Hankook, Pirelli, Nokian, Lexani and Accelera, covering premium, performance and value tiers as well as summer, all-season and winter designs.