2017 Audi S3 — Premium Plus
The 2017 Audi S3 Premium Plus 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.
225/40R18
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (90 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.1" |
| Revolutions per mile | ~804 |
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235/35R19
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (82.3 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~25.5" |
| Revolutions per mile | ~792 |
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What this size means for your Audi S3
On the 2017 Audi S3 Premium Plus, the factory 225/40R18 measures about 25.1″ in overall diameter with a 90 mm (3.5″) sidewall, and completes roughly 804 revolutions per mile. Its 40-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 passenger (P-metric / Euro-metric) size.
The 225/40R18 and 235/35R19 differ in both width and overall diameter (0.4″, 1.6%), which usually means a staggered front/rear setup — the two sizes are not interchangeable side to side, so match each to its correct axle.
Other 2017 Audi S3 trims
- Prestige 225/40R18 / 235/35R19
Audi S3 tire sizes by year
- 2026 Audi S3 225/40R18 / 235/35R19
- 2025 Audi S3 225/40R18 / 235/35R19
- 2024 Audi S3 225/40R18 / 235/35R19
- 2023 Audi S3 225/40R18 / 235/35R19
- 2022 Audi S3 225/40R18 / 235/35R19
- 2020 Audi S3 225/40R18 / 235/35R19
- 2019 Audi S3 225/40R18 / 235/35R19
- 2018 Audi S3 225/40R18 / 235/35R19
- 2016 Audi S3 225/40R18 / 235/35R19
- 2015 Audi S3 225/40R18 / 235/35R19
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.