255/40R21 tires are in stock now with 19 options spanning seven brands, from premium touring rubber to performance and value builds. Shop names like Continental, Pirelli, Hankook, Nokian, Toyo, Falken and Lexani in one place, with free shipping on every order, Affirm financing, and fast delivery from a nationwide network.
Shop 255/40R21 Tires In Stock
Showing 19 in stock.
What 255/40R21 tires means
Reading the code left to right: the tire has a section width of 255 mm (about 10.04 inches) measured across the widest part of the tread. The 40 is the aspect ratio, meaning the sidewall height is 40% of the section width — that works out to 102 mm (roughly 4.02 inches) of sidewall. The R confirms radial construction, and 21 is the wheel diameter in inches this tire is built to mount on.
Put together, a 255/40R21 has an overall diameter of about 29.03 inches and turns roughly 695 revolutions per mile. Those numbers matter to you directly: overall diameter and revs-per-mile determine speedometer and odometer accuracy, so staying close to your original size keeps your readings honest. The relatively short 4-inch sidewall favors crisp steering response over cushioning, which is why clearance and ride comfort are worth weighing before you buy.
Vehicles & uses
This is a large-diameter, low-profile fitment commonly found on luxury SUVs and performance-oriented sedans that ship from the factory on 21-inch wheels. The short sidewall and wide tread are geared toward responsive handling rather than soft-riding comfort. Always confirm the size, load, and speed requirements printed on your door placard or owner's manual before ordering, since correct fitment depends on your specific vehicle and trim.
Brands & options in 255/40R21 tires
You'll find a genuine spread of tiers in this size. On the premium performance side, Pirelli offers the P-Zero (PZ4) and the PZero, while Continental covers a wide range with the ContiSportContact 5, the EV-minded EcoContact6 Q, and the CrossContact RX for crossovers.
For all-season and cold-weather performance, Nokian brings the Surpass AS01 and the winter-focused Hakkapeliitta R5 EV, and Hankook offers the iON evo AS SUV IH01A. Toyo spans sport and all-weather use with the Celsius Sport and the Proxes Sport 2. On the value end, Lexani offers the LX-TWENTY, and Falken rounds out the lineup. Browse everything together on the all tires hub.
How to choose
Season
Pick a season category that matches your climate. Summer tires deliver the sharpest dry and wet grip in warm temperatures, all-season tires balance year-round usability, and winter tires stay pliable and grip best in cold, snow, and ice.
Treadwear & UTQG
The UTQG rating shows treadwear, traction, and temperature grades. A higher treadwear number generally suggests longer expected wear, while performance-focused compounds often trade some longevity for grip.
Load index & speed rating
Match or exceed the load index and speed rating your vehicle calls for. Many 255/40R21 options carry an XL (extra load) designation for the higher weight demands of larger vehicles — confirm the letter and number against your placard.
Warranty
Warranty coverage varies by model and brand. Check the specific tire's mileage and workmanship terms before purchase so you know what's covered.
Frequently Asked Questions
What does 255/40R21 tires mean?
It describes a radial tire that is 255 mm wide (about 10.04 in), with a sidewall height 40% of that width (102 mm / about 4.02 in), built for a 21-inch wheel. Its overall diameter is roughly 29.03 inches, turning about 695 revolutions per mile.
How much do 255/40R21 tires cost?
Prices currently range from about $176.10 to $585.99 per tire, depending on brand, model, and performance category.
Which brands are available in 255/40R21?
You can shop Continental, Hankook, Nokian, Toyo, Pirelli, Falken, and Lexani in this size, covering premium, performance, and value choices.