2010 Audi A5 — Cabriolet 2.0T FrontTrak Premium
The 2010 Audi A5 Cabriolet 2.0T FrontTrak Premium came from the factory equipped with 245/40R18 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.
245/40R18
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (98 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.7" |
| Revolutions per mile | ~784 |
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What this size means for your Audi A5
On the 2010 Audi A5 Cabriolet 2.0T FrontTrak Premium, the factory 245/40R18 measures about 25.7″ in overall diameter with a 98 mm (3.9″) sidewall, and completes roughly 784 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.
On a vehicle of this age, the Audi A5 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 2010 Audi A5 trims
- 2.0T Premium 245/40R18
- 2.0T Premium Plus 245/40R18 / 255/35R19
- 2.0T Prestige 245/40R18 / 255/35R19
- 2.0T S-Line 255/35R19
- 2.0T Sport 255/35R19
- 3.2 Premium Plus 245/40R18 / 255/35R19
- 3.2 Prestige 245/40R18 / 255/35R19
- 3.2 S-Line 255/35R19
- 3.2 Sport 255/35R19
- 3.2 with Runflat Tires 245/45R17 / 245/40R18
- Cabriolet 2.0T FrontTrak Premium Plus 245/40R18 / 255/35R19
- Cabriolet 2.0T FrontTrak Prestige 245/40R18 / 255/35R19
- Cabriolet 2.0T FrontTrak S-Line 255/35R19
- Cabriolet 2.0T quattro Premium Plus 245/40R18 / 255/35R19
- Cabriolet 2.0T quattro Prestige 245/40R18 / 255/35R19
- Cabriolet 2.0T quattro S-Line 255/35R19
Audi A5 tire sizes by year
- 2026 Audi A5 235/45R18 / 245/40R19
- 2025 Audi A5 235/45R18 / 245/40R19
- 2024 Audi A5 245/40R18 / 255/35R19
- 2023 Audi A5 245/40R18 / 255/35R19
- 2022 Audi A5 245/40R18 / 255/35R19
- 2021 Audi A5 245/40R18 / 255/35R19
- 2020 Audi A5 245/40R18 / 255/35R19
- 2019 Audi A5 245/40R18 / 255/35R19
- 2018 Audi A5 245/40R18 / 255/35R19
- 2017 Audi A5 245/40R18 / 255/35R19
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.