The 2019 Audi Q7 does not have a single tire size across all models; the size depends on the wheel diameter and trim level. The most common factory sizes are 255/55R19 for 19-inch wheels, 255/50R20 for 20-inch wheels, and 275/40R21 for 21-inch wheels. To be certain, check the door jamb placard or the owner's manual, as market and option packages can change the exact spec.
Common tire sizes by wheel diameter
Below are the typical OEM sizes associated with the common wheel diameters offered on the 2019 Q7. Note that variations can occur by market and specific option packages.
- 19-inch wheels: 255/55R19
- 20-inch wheels: 255/50R20
- 21-inch wheels: 275/40R21
Keep in mind that some configurations or dealer-installed tires might use alternate sizing, so always verify the exact specification for your vehicle.
Understanding the tire markings
Tire size markings convey essential information. For example, in 255/55R19:
- 255 indicates the tire width in millimeters.
- 55 is the aspect ratio (height as a percentage of width).
- R denotes radial construction.
- 19 is the wheel diameter in inches.
Understanding these markings helps you identify the correct replacement size when options change or when swapping wheels.
How to verify the exact size for your vehicle
To confirm the precise tire size currently installed on your 2019 Q7, use these steps:
- Inspect the tire sidewall for the size code (for example, P255/55R19).
- Check the driver’s door jamb placard, which lists the recommended OE tire size for that vehicle.
- Consult the owner's manual or the vehicle’s build sheet/VIN lookup for the original equipment specifications.
- If in doubt, contact an Audi dealer or a qualified tire professional with your VIN to pull the exact specification.
Using the correct size is important for ride quality, handling, speedometer accuracy, and tire wear. If you’re replacing tires or changing wheel sizes, choose sizes that match Audi’s recommendations for your exact model and trim.
Summary
For a 2019 Audi Q7, tire sizes vary by wheel size: 19-inch wheels typically use 255/55R19, 20-inch wheels use 255/50R20, and 21-inch wheels use 275/40R21. Always verify the exact size on the door jamb placard, in the owner's manual, or via the VIN lookup to ensure accurate replacement and optimal performance.