255/40R21
Tire size lookup — every vehicle row in this catalog that lists 255/40R21 (23 references).
Use this page as a reverse index: jump to a make/model page for year-sorted context, or follow a bolt pattern link when you are also matching wheels. Trims and markets vary, so treat each row as a guide and confirm against your installed tires and manufacturer documentation.
From here you can open the tire sizes catalog or the bolt pattern catalog for broader browsing.
FAQ
- What does the 255/40R21 tire marking mean?
- 255/40R21 is a metric tire code: section width in millimeters, aspect ratio (sidewall height as a percent of width), construction (R = radial), and rim diameter in inches. Always match load/speed ratings and verify overall diameter effects on your speedometer.
- Why are several different vehicles listed for one tire size?
- Many OEM applications reuse the same tire marking across makes, model years, and trims. This page groups catalog rows that reference the marking so you can compare wheel references and follow links to model-specific pages.
- Is this official OEM documentation?
- No—treat this dataset as a practical reference compiled from public-style fitment rows. Markets, packages, and factory options differ; verify the exact row for your VIN or tire placard before ordering.
| Vehicle | Year | Tire | Wheel | Bolt | Pressure |
|---|---|---|---|---|---|
| AUDI e-tron e-tron 55 quattro / e-tron Sportback 55 | 2022 | 255/40R21 | 8.5" × 21" | 5×112 | 32 psi / 2.2 bar |
| AUDI e-tron GT e-tron GT S line | 2025 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| AUDI Q4 Q4 60 e-tron (anticipated US launch) | 2026 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| AUDI SQ5 3.0T TFSI Quattro + Mild Hybrid | 2026 | 255/40R21 | 8.5" × 21" | 5×112 | 36 psi / 2.5 bar |
| AUDI SQ5 3.0T TFSI Quattro + Mild Hybrid | 2025 | 255/40R21 | 8.5" × 21" | 5×112 | 36 psi / 2.5 bar |
| AUDI SQ5 3.0T TFSI Quattro + Mild Hybrid | 2024 | 255/40R21 | 8.5" × 21" | 5×112 | 36 psi / 2.5 bar |
| AUDI SQ5 3.0T TFSI Quattro + Mild Hybrid | 2023 | 255/40R21 | 8.5" × 21" | 5×112 | 36 psi / 2.5 bar |
| BMW i7 i7 M70 xDrive | 2024 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| CADILLAC XT4 2025 Refresh AWD | 2025 | 255/40R21 | 9.5" × 21" | 5×115 | 32 psi / 2.2 bar |
| LEXUS RX RX 500h AWD | 2026 | 255/40R21 | 8.5" × 21" | 5×114.3 | 32 psi / 2.2 bar |
| LEXUS RX RX 500h F-Sport | 2025 | 255/40R21 | 8.5" × 21" | 5×114.3 | 32 psi / 2.2 bar |
| LEXUS RX RX 500h | 2024 | 255/40R21 | 8.5" × 21" | 5×114.3 | 32 psi / 2.2 bar |
| Mercedes EQE EQE 500 4MATIC | 2024 | 255/40R21 | 8.5" × 21" | 5×112 | 32 psi / 2.2 bar |
| Mercedes EQS EQS 450+ (Facelift) | 2023 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| Mercedes GLC GLC 300 / GLC 43 AMG / GLC 450e (MY25) | 2025 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| Mercedes GLC GLC 300 / GLC 43 AMG / GLC 450e (MY24) | 2024 | 255/40R21 | 9" × 21" | 5×112 | 32 psi / 2.2 bar |
| Rolls Royce Ghost 6.75 V12 | 2023 | 255/40R21 | 8.5" × 21" | 5×120 | 32 psi / 2.2 bar |
| Rolls Royce Wraith Base | 2021 | 255/40R21 | 8.5" × 21" | 5×120 | 32 psi / 2.2 bar |
| Rolls Royce Wraith Base | 2019 | 255/40R21 | 8.5" × 21" | 5×120 | 32 psi / 2.2 bar |
| VOLKSWAGEN Atlas Cross Sport GT | 2026 | 255/40R21 | 8.5" × 21" | 5×112 | 32 psi / 2.2 bar |
| Volvo XC60 D5 | 2025 | 255/40R21 | 9" × 21" | 5×108 | 32 psi / 2.2 bar |
| Volvo XC60 T6 | 2025 | 255/40R21 | 9" × 21" | 5×108 | 32 psi / 2.2 bar |
| VOLVO XC90 XC90 Recharge Pure Electric (concept-spec) | 2025 | 255/40R21 | 9" × 21" | 5×108 | 32 psi / 2.2 bar |
Tire size calculatorShow
Compare two tire sizes — diameter, speedometer error, and clearance change.