2022 Audi Q8 — Prestige
The 2022 Audi Q8 Prestige shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
285/45R21
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (128.3 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~31.1" |
| Revolutions per mile | ~649 |
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285/40R22
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (114 mm) |
| Rim diameter | 22" |
| Overall tire diameter | ~31" |
| Revolutions per mile | ~651 |
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What this size means for your Audi Q8
On the 2022 Audi Q8 Prestige, the factory 285/45R21 measures about 31.1″ in overall diameter with a 128.3 mm (5.1″) sidewall, and completes roughly 649 revolutions per mile. Its 45-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a large-diameter fitment.
The 285/45R21 and 285/40R22 roll within 0.1″ (0.3%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
Other 2022 Audi Q8 trims
- Premium 285/45R21
- Premium Plus 285/45R21 / 285/40R22
Audi Q8 tire sizes by year
- 2026 Audi Q8 285/45R21
- 2025 Audi Q8 285/45R21 / 285/40R22
- 2024 Audi Q8 285/45R21
- 2023 Audi Q8 285/45R21
- 2021 Audi Q8 275/50R20 / 285/45R21
- 2020 Audi Q8 275/50R20 / 285/45R21
- 2019 Audi Q8 275/50R20 / 285/45R21
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.