Tires
255/40R21 Tires
Shop 255/40R21 tires for trucks, SUVs, and light-duty pickups. Compare all-season, winter, and all-weather options from top brands with free shipping across Canada.
86 products found
255/40R21 Tires — Buying Guide for Canadian Drivers
255/40R21 is a popular tire size for trucks, SUVs, and light-duty pickups in Canada. You may also see this size written as 255/40R21, 255 40 R21, 255-40-21, or 2554021 — all of those refer to the same tire. When shopping 255/40R21 tires, look for a load index that matches your vehicle's placard rating (typically 91–110 for passenger and light truck applications) and a speed rating of H or V for highway driving. All-season 255/40R21 tires are built for spring, summer, and fall driving when average temperatures stay above 7 °C — they harden in real Canadian winter cold, so they're not a substitute for proper winter rubber. For sub-zero temperatures, snow, and ice you want a dedicated winter tire in 255/40R21 with the Three-Peak Mountain Snowflake (3PMSF) symbol, which is also a legal requirement in Quebec from December 1 to March 15. All-weather 255/40R21 tires split the difference — 3PMSF-certified for winter use but designed to run year-round without a seasonal swap, which is the right call for milder Canadian climates. Filter by season, brand, speed rating, and load index above to find the right 255/40R21 tire for your vehicle. Autrex ships across Canada with free shipping on orders over $99.
255/40R21 tire size specifications
255/40R21 is a metric tire size: a 255 mm section width, a sidewall 40% as tall as that width, on a 21-inch rim.
| Specification | Value | Source |
|---|---|---|
| Tire size | 255/40R21 | From the size |
| Sizing system | Metric | From the size |
| Section width | 255 mm (10.0 in) | From the size |
| Aspect ratio | 40% | From the size |
| Sidewall height | 102 mm (4.0 in) | Calculated |
| Rim diameter | 21 in | From the size |
| Overall diameter | 737 mm (29.0 in) | Calculated |
| Circumference | 2,317 mm (91.2 in) | Calculated |
| Revolutions per km | 432 | Calculated |
| Overall diameter reported on listings | 25.90 to 29.21 in | Listings in stock |
| Load index | 102, 105 | Listings in stock |
| Speed rating | H, S, T, V, W, Y | Listings in stock |
| Tire type | LT, P, Unknown | Listings in stock |
| Seasons | All-season, All-weather, Summer, Winter | Listings in stock |
Dimensions are calculated from the size and are nominal; real tires vary by model. Load index, speed rating and load range are read from the 86 255/40R21 tires we list in stock. Match them to your vehicle's placard.
Compare 255/40R21 tires by brand
86 255/40R21 tires in stock from 26 brands. Prices are per tire in CAD.
| Brand | In stock | Price per tire | Load index | Speed rating | Season | Models |
|---|---|---|---|---|---|---|
| Pirelli | 17 | $474 to $661 | 102 | H, V, W, Y | All-season, Summer, Winter | SCORPION WINTER 2, SCORPION ZERO ALL SEASON, P ZERO |
| Michelin | 15 | $531 to $809.95 | 102, 105 | H, V, W, Y | All-season, Summer, Winter | Primacy Tour A/S, X-Ice Snow, Pilot Alpin 5 |
| Continental | 10 | — | — | — | — | — |
| Continental Tire | 10 | $512 to $679 | 102 | H, T, V, W, Y | All-season, Summer, Winter | VikingContact 8, IceContact XTRM, IceContact XTRM Studded |
| Bridgestone | 7 | $436 to $638 | 102 | H, W, Y | All-season, Summer, Winter | Alenza Sport A/S, Blizzak 6, Alenza 001 |
| Hankook | 7 | $426 to $581 | 102 | V, Y | All-season, Summer, Winter | iON I-Cept SUV, Winter I-Cept Evo4 SUV, Ventus S1 Evo Z |
| Goodyear | 6 | $469 to $683 | 102 | H, W, Y | All-season, All-weather | Assurance Rangemax, Eagle F1 All Season, Eagle F1 Asymmetric 6 |
| Toyo Tire | 4 | $422 to $446 | 102, 105 | Y | All-season, All-weather, Summer | Proxes Sport 2, Celsius Sport, Proxes Sport A/S+ |
| Yokohama | 3 | $427 to $520 | 102 | T, W, Y | All-season, Summer, Winter | Iceguard G075, Advan Sport V107, Geolandar X-CV |
| Atturo | 2 | $246 to $284 | 102 | Y | All-weather, Summer | AZ850, AZ810 |
| Bearway | 2 | $149 to $230 | 102 | S, W | Winter | BW118, BW-Ice |
| Accelera | 1 | $279 | 102 | W | All-season | Iota ST68 |
| Falken | 1 | $453 | 102 | Y | All-season | Azenis FK460 |
| Haida | 1 | $150 | 102 | Y | All-season | HD937 UHP Performance |
| iLink Tires | 1 | $199 | 102 | T | Winter | Wintervorhut Stud II |
| Kapsen | 1 | $205 | 102 | W | Summer | K3000 |
| Kapsen Tires | 1 | — | — | — | — | — |
| Kumho | 1 | $340 | 102 | W | Winter | WinterCraft SUV WS71 |
| Lionhart | 1 | $385 | 102 | Y | All-season | LH-FIVE |
| Nankang | 1 | $233 | 102 | Y | Summer | AS-3 |
| Radar Tires | 1 | $232 | 102 | Y | Summer | Dimax R8+ |
| Sailun | 1 | $302 | 102 | H | Winter | WSTX |
| Triangle | 1 | $258 | 102 | Y | Summer | TH202 |
| Unistar | 1 | $299 | 102 | H | Winter | Ice-Protection |
| Unistar Tires | 1 | — | — | — | — | — |
| ZETA | 1 | $190 | 102 | Y | Summer | Alventi |
Vehicles that come with 255/40R21 tires
Our fitment reference lists 255/40R21 as a factory tire size on these vehicles. Check the placard in your door jamb for your exact trim before you order.
- Alfa Romeo Stelvio (2020 to 2025)Trims: Base, Competizione, Estrema, Lusso
- Audi Q5 (2016 to 2017)Trims: Premium Plus, Prestige
- Audi Q5 Sportback (2021 to 2027)Trims: Premium Plus, Prestige, Progressiv, Technik
- Audi SQ5 (2016 to 2027)Trims: Dynamic Edition, Premium, Premium Plus, Prestige
- Audi SQ5 Sportback (2021 to 2027)Trims: Premium, Premium Plus, Prestige, Progressiv
- BMW 740 (2027)Trims: Base
- BMW 740 xDrive (2027)Trims: Base
- BMW 740i (2023 to 2026)Trims: Base
- BMW 740i xDrive (2024 to 2026)Trims: Base
- BMW 750e xDrive (2024 to 2026)Trims: Base
- BMW 760i xDrive (2023 to 2026)Trims: Base
- BMW i7 (2023 to 2026)Trims: M70 xDrive, eDrive50, xDrive60
- BMW X3 (2020 to 2027)Trims: 30 xDrive, M, M Competition, xDrive30
- BMW X4 (2020 to 2025)Trims: M, M Competition
- Genesis GV60 (2023 to 2026)Trims: Advanced AWD, Performance AWD
- Genesis GV70 (2022 to 2027)Trims: Advanced, Advanced Plus, Base, Prestige
- Kia EV6 (2022 to 2026)Trims: GT, GT-Line, Light Long Range, Long Range
- Maserati Grecale (2023 to 2027)Trims: Base, Folgore, GT, Modena
- Mercedes-Benz GLC43 AMG (2017 to 2023)Trims: 4Matic
- Mercedes-Benz GLC300 (2017 to 2022)Trims: 4Matic
- Mercedes-Benz S63 AMG E Performance (2024 to 2026)Trims: 4Matic+
- Rolls-Royce Dawn (2017 to 2021)Trims: Base, Black Badge
- Rolls-Royce Ghost (2017 to 2027)Trims: Base, Black Badge, EWB
- Rolls-Royce Wraith (2017 to 2021)Trims: Base, Black Badge, Eagle VIII, Kryptos
- Volvo XC60 (2018 to 2027)Trims: B5 Core, B5 Plus, B5 R-Design, B5 Ultimate
The list is capped, so older model years of some vehicles may be missing.
255/40R21 tire questions
- What does 255/40R21 mean?
- 255/40R21 describes a tire 255 mm wide at its widest point, with a sidewall 40% as tall as it is wide, built for a 21-inch rim.
- How tall is a 255/40R21 tire?
- Calculated from the size, a 255/40R21 tire stands about 737 mm (29.0 inches) tall. The tires we list in this size report 25.90 to 29.21 inches, because real tires vary by model.
- Which brands make 255/40R21 tires?
- We currently list 255/40R21 tires from Pirelli, Michelin, Continental, Continental Tire, Bridgestone, Hankook, Goodyear and Toyo Tire.
- Which vehicles use 255/40R21 tires?
- Our fitment reference lists 255/40R21 as a factory size on vehicles including Alfa Romeo Stelvio, Audi Q5, Audi Q5 Sportback, Audi SQ5 and Audi SQ5 Sportback. Confirm the placard size for your trim before you order.
