2003 Audi A6 — Avant Quattro
The 2003 Audi A6 Avant Quattro 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.
215/55R16
| Section width | 215 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (118.3 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~25.3" |
| Revolutions per mile | ~797 |
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235/45R17
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (105.8 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~25.3" |
| Revolutions per mile | ~796 |
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What this size means for your Audi A6
On the 2003 Audi A6 Avant Quattro, the factory 215/55R16 measures about 25.3″ in overall diameter with a 118.3 mm (4.7″) sidewall, and completes roughly 797 revolutions per mile. Its 55-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 215/55R16 and 235/45R17 roll within 0″ (0%) 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.
On a vehicle of this age, the Audi A6 may have been refitted with a slightly different replacement size somewhere in its life, so check the current sidewall — not just the factory spec — before buying.
Other 2003 Audi A6 trims
- 2.7T 235/45R17
- 3.0L FWD 205/55R16
- 3.0L Quattro 215/55R16
- 4.2 215/55R16 / 255/40R17
Audi A6 tire sizes by year
- 2026 Audi A6 245/45R20
- 2025 Audi A6 245/45R20
- 2024 Audi A6 245/45R20
- 2023 Audi A6 245/45R20
- 2022 Audi A6 245/45R20
- 2021 Audi A6 245/45R20
- 2020 Audi A6 245/45R20
- 2019 Audi A6 245/45R19 / 255/40R20
- 2018 Audi A6 245/45R18 / 255/40R19 / 255/35R20
- 2017 Audi A6 245/45R18 / 255/40R19 / 255/35R20
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.