2016 Audi S8 — Plus
The 2016 Audi S8 Plus came from the factory equipped with 275/35R21 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
275/35R21
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (96.3 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~28.6" |
| Revolutions per mile | ~706 |
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What this size means for your Audi S8
On the 2016 Audi S8 Plus, the factory 275/35R21 measures about 28.6″ in overall diameter with a 96.3 mm (3.8″) sidewall, and completes roughly 706 revolutions per mile. Its 35-series aspect ratio gives an ultra-low-profile, performance-oriented sidewall that favors steering precision over ride cushioning. In tire terms it is a large-diameter fitment.
Other 2016 Audi S8 trims
- Base Model 265/35R21 / 275/35R21
Audi S8 tire sizes by year
- 2026 Audi S8 265/35R21
- 2025 Audi S8 265/40R20 / 265/35R21
- 2024 Audi S8 265/40R20 / 265/35R21 / 275/35R21
- 2023 Audi S8 265/40R20 / 265/35R21 / 275/35R21
- 2022 Audi S8 265/40R20 / 265/35R21 / 275/35R21
- 2021 Audi S8 265/40R20 / 265/35R21 / 275/35R21
- 2020 Audi S8 265/40R20 / 265/35R21 / 275/35R21
- 2018 Audi S8 275/35R21
- 2017 Audi S8 275/35R21
- 2015 Audi S8 265/35R21 / 275/35R21
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.