The Audi S4 from the 2019 model year typically uses 18-inch wheels with 245/40R18 tires as standard; 19-inch wheel setups commonly use 255/35R19; and some markets and trims offer 20-inch wheels with 275/30R20 tires. Always verify the exact size on the door jamb placard or in the owner’s manual, as wheel options vary by market and configuration.
In this article, we outline the typical sizes found on 2019 S4 models, explain how to read the tyre codes, and point you to where you can confirm the correct size for your particular car.
Tire sizes by wheel size
Below are the sizes most commonly fitted to the 2019 Audi S4 across markets and typical configurations. Your car’s exact size may differ if it wears different wheels or is a special edition.
- 245/40R18 — standard on 18-inch wheel configurations
- 255/35R19 — common on 19-inch wheel setups (sport/upgrade wheels)
- 275/30R20 — used on some 20-inch wheel configurations in certain markets
Note: Always check the tyre placard on the driver’s door jamb or the owner’s manual for the precise size specified for your vehicle, as sizes can vary by market, trim level, and production date.
Market-specific differences
European, North American and other regional models sometimes differ in their factory wheel/tire combinations. If you are buying winter tires or a different wheel package, verify compatibility with the S4’s braking clearances, rollover protection, and speed/load ratings. An incorrect size can affect speedometer accuracy, traction control, and ride quality.
Summary
For the 2019 Audi S4, you’ll typically encounter 245/40R18 on 18-inch wheels, 255/35R19 on 19-inch wheels, and 275/30R20 on some 20-inch setups. Always confirm the exact specification on your vehicle’s placard and consult your dealer or the owner’s manual if you’re replacing tires or upgrading wheels.