285/40 R21 tires: vehicles that use this size
285/40 R21 is a factory or optional tire size on 9 models.
| Vehicle | Years | Fitment |
|---|---|---|
| Audi Q7 | 2017–2025 | Factory |
| Audi SQ6 e-tron | 2025 | Factory · rear |
| Audi SQ6 Sportback e-tron | 2025 | Factory · rear |
| Audi SQ7 | 2020–2025 | Factory |
| Porsche Cayenne | 2019–2023 | Factory · front |
| Audi e-tron S | 2022 | Optional |
| Audi e-tron S Sportback | 2022 | Optional |
| Audi SQ8 e-tron | 2024 | Optional |
| Audi SQ8 e-tron Sportback | 2024 | Optional |
How to read 285/40 R21
- 285
- Tread width in millimetres
- 40
- Sidewall height, % of width
- R
- Radial construction
- 21
- Wheel diameter in inches
Overall diameter: about 30.0" · Sidewall: 114 mm