What is the recommended tire pressure for a 2019 Audi A4?

The 2019 Audi A4 uses 38 PSI cold on the front axle and 38 PSI cold on the rear axle. These are the OEM specifications. Always measure tire pressure when the tires are cold — before driving or after sitting for at least 3 hours.

What tire size does the 2019 Audi A4 use?

The standard (base trim) tire size for the 2019 Audi A4 is 245/45R17. Higher trim levels and optional packages may use a different size — check the sticker inside your driver's door for the exact specification for your vehicle.

How do I convert the 2019 Audi A4 tire pressure to bar?

38 PSI = 2.6 bar (front) and 38 PSI = 2.6 bar (rear). In kPa: 262 kPa front and 262 kPa rear. Multiply PSI × 0.0689 to convert to bar.

Why are the front and rear tire pressures the same on the 2019 Audi A4?

The 2019 Audi A4 uses equal pressure front and rear (38 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.

What happens if the 2019 Audi A4 tires are underinflated?

Running 5+ PSI low on the Audi A4 causes uneven shoulder wear, increased rolling resistance (worse fuel economy), higher tire operating temperature, and reduced wet braking performance. In extreme cases, chronic underinflation can cause sidewall failure. Check pressure monthly and always after a large temperature swing.

What do the numbers in 245/45R17 mean on the 2019 Audi A4?

On the 2019 Audi A4, 245/45R17 breaks down as: 245 = section width in millimetres (9.65"), 45 = aspect ratio (the sidewall is 45% of the width, so 110.3 mm / 4.34" tall), R = radial construction, and 17 = the wheel diameter in inches.

What is the overall diameter of the 2019 Audi A4 tires?

The 245/45R17 tire on the 2019 Audi A4 has an overall diameter of about 25.68" (652 mm) and a rolling circumference of roughly 80.68", giving about 785 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.

2019 Audi A4 Tire Pressure

OEM cold pressure spec — verified for the 2017–2024 generation.

Recommended cold pressure

Front

38PSI

262 kPa

Rear

38PSI

262 kPa

Tire size

245/45R17

Curb weight

1,545 kg

Front axle

57%

2019 Audi A4 tire size: 245/45R17

The factory (base-trim) tire size for the 2019 Audi A4 is 245/45R17. Here is what that size measures out to in the real world — useful when comparing replacement tires or checking whether a different size will fit.

Section width

245 mm

9.65"

Aspect ratio

45%

110.3 mm sidewall

Wheel diameter

17"

rim

Overall diameter: 25.68"; 652 mm
Sidewall height: 4.34"; 110.3 mm
Circumference: 80.68"; rolling
Revs / mile: 785; approx.

Staying within ±3% of the 25.68" overall diameter keeps your speedometer accurate. A larger diameter reads slower than your true speed; a smaller one reads faster.

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Recommended COLD pressure

27.5 / 22 PSI

Front (cold): 27.5 PSI(1.9 bar)
Rear (cold): 22 PSI(1.52 bar)
Front (hot est.): 30.2 PSI
Rear (hot est.): 24.2 PSI

Street setting: balanced for comfort, wear, and fuel economy. Always measure cold.

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FAQ

2019 Audi A4

What is the recommended tire pressure for a 2019 Audi A4?: The 2019 Audi A4 uses 38 PSI cold on the front axle and 38 PSI cold on the rear axle. These are the OEM specifications. Always measure tire pressure when the tires are cold — before driving or after sitting for at least 3 hours.
What tire size does the 2019 Audi A4 use?: The standard (base trim) tire size for the 2019 Audi A4 is 245/45R17. Higher trim levels and optional packages may use a different size — check the sticker inside your driver's door for the exact specification for your vehicle.
How do I convert the 2019 Audi A4 tire pressure to bar?: 38 PSI = 2.6 bar (front) and 38 PSI = 2.6 bar (rear). In kPa: 262 kPa front and 262 kPa rear. Multiply PSI × 0.0689 to convert to bar.
Why are the front and rear tire pressures the same on the 2019 Audi A4?: The 2019 Audi A4 uses equal pressure front and rear (38 PSI). The vehicle's weight distribution and symmetric tire sizing mean both axles carry similar loads per tire.
What happens if the 2019 Audi A4 tires are underinflated?: Running 5+ PSI low on the Audi A4 causes uneven shoulder wear, increased rolling resistance (worse fuel economy), higher tire operating temperature, and reduced wet braking performance. In extreme cases, chronic underinflation can cause sidewall failure. Check pressure monthly and always after a large temperature swing.
What do the numbers in 245/45R17 mean on the 2019 Audi A4?: On the 2019 Audi A4, 245/45R17 breaks down as: 245 = section width in millimetres (9.65"), 45 = aspect ratio (the sidewall is 45% of the width, so 110.3 mm / 4.34" tall), R = radial construction, and 17 = the wheel diameter in inches.
What is the overall diameter of the 2019 Audi A4 tires?: The 245/45R17 tire on the 2019 Audi A4 has an overall diameter of about 25.68" (652 mm) and a rolling circumference of roughly 80.68", giving about 785 revolutions per mile. Fitting a tire with a different diameter will throw off your speedometer and odometer.