2019 Audi A4 Tires

The 2019 Audi A4 uses three primary tire sizes: 225/50R17, 245/40R18, and 245/35R19. All are radial sizes, but they do not apply across every car in the lineup. The correct size depends on the sub-model and, just as importantly, the wheel package actually installed on the vehicle.

That means the right starting point is the tire sidewall or the wheel itself, not the model name alone. A Premium can use either 17-inch or 18-inch fitment, while Premium Plus and Prestige can use 18-inch or 19-inch fitment. Choosing the correct tire starts with matching the car’s actual wheel diameter and then selecting the proper size within that setup.

A 2019 Audi A4 can use 17-inch, 18-inch, or 19-inch rims depending on the tire size installed. The 225/50R17 size uses a 17-inch rim, 245/40R18 uses an 18-inch rim, and 245/35R19 uses a 19-inch rim. All three are radial fitments.

Rim diameter is the most important fitment detail to confirm before buying tires because a tire only mounts to the wheel diameter it was built for. Once the diameter is verified, wheel width is the next detail worth checking, especially if the car has aftermarket wheels. That helps narrow the field to tires that suit both the size and the wheel setup.

No, the 2019 Audi A4 sub-models do not all use the same tire size. Premium uses 225/50R17 or 245/40R18, Premium Plus uses 245/40R18 or 245/35R19, Prestige uses 245/40R18 or 245/35R19, and Titanium uses 245/40R18. The overlap is strong, but the fitment is not universal across every trim.

This matters because the A4 range spans three wheel diameters, and the tire size must match the wheel on the car. Two cars with the same model year and body can still need different tires if one has 18-inch wheels and another has 19-inch wheels. Verifying the exact trim and actual wheel setup avoids ordering by assumption.

Start with the exact tire size and wheel diameter already on the car, since the 2019 Audi A4 uses 225/50R17, 245/40R18, or 245/35R19 depending on configuration. All three are radial fitments, so the next comparison points are tire series, sidewall style, and any product details such as rim-width suitability or load figures where they are stated.

A 17-inch setup, an 18-inch setup, and a 19-inch setup each lead to a different product pool, so the buying decision changes with the wheel package. Owners keeping a stock-style appearance may stay with a straightforward blackwall, while others may compare redline or raised white letter options in 245/40R18. Matching the tire to how the car is driven is just as important as matching the size.

Blackwall is the most common sidewall style available for the 2019 Audi A4 tire sizes, and it appears in all three fitments. In 245/40R18, there are also redline and RWL options. RWL refers to raised white letter sidewalls, giving that size a noticeably different visual presentation from a standard blackwall tire.

Sidewall choice does not change the need to match the correct size and rim diameter, but it can strongly affect how the car looks. A blackwall keeps the presentation understated and modern, while redline or raised white letters create a more custom or enthusiast-oriented look. That makes 245/40R18 the most appearance-driven size to compare within the A4 range.

Tires for the 2019 Audi A4 are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac across the applicable sizes. BFGoodrich and Nitto appear in all three primary fitments, while M&H Racemaster and Pro-Trac are present in 245/40R18. The available tire series vary by size, so brand choice depends partly on the wheel package on the car.

Brand alone should not be the only deciding factor. It helps to compare which series each brand offers in the correct size, whether the tire is blackwall, redline, or raised white letter, and whether the rim-width specification matches the wheel being used. That approach gives a more useful comparison than choosing only by name.

A period-style approach for a 2019 Audi A4 usually starts with keeping the correct wheel diameter and tire size already associated with the car’s trim and setup. Since all primary fitments are modern radial sizes, the appearance decision comes more from the selected tire series and sidewall treatment than from choosing between vintage-style constructions.

For a cleaner contemporary presentation, blackwall tires align naturally with the A4’s original era. If the car is being styled in a more customized direction, 245/40R18 opens the door to redline and raised white letter sidewalls that create a much different look. Owners pursuing exact originality should also compare against vehicle-specific documentation and the car’s existing wheel package.

On a 2019 Audi A4, construction does not create the kind of visual split seen on much older vehicles because the primary fitments are all radial. The appearance difference comes more from profile and sidewall treatment than from bias-ply versus radial choice. A 17-inch, 18-inch, or 19-inch package changes the overall stance noticeably.

That makes wheel-and-tire proportion especially important on an A4 being refreshed or cosmetically restored. A 225/50R17 reads differently than a 245/35R19 even though both belong to the same model line. Staying with the proper size family for the car preserves the intended visual balance, while sidewall style lets the owner fine-tune the final presentation.

Yes, modifications can affect tire fitment on a 2019 Audi A4 even when the tire size matches one of the original size families. Aftermarket wheels can change width or offset, and suspension changes can alter clearance around the fenders, inner liners, and steering components. Those changes matter most on the wider 245-section tires and lower-profile wheel packages.

A car that still carries stock wheels and ride height is simpler to match than one that has been lowered or re-wheeled. Checking wheel diameter, wheel width, and visible clearance before ordering helps prevent problems that the nominal tire size alone does not reveal. Alignment condition is also worth reviewing because it affects how a fresh set of tires will wear.

Before driving a 2019 Audi A4 on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and make sure inflation is set correctly for the installation. It also helps to check the valve stems, look over suspension and steering components for looseness, and verify that the tires clear properly at full lock.

Road use puts immediate stress on any unresolved issue, so it is smart to catch rubbing, alignment trouble, or vibration before the car is driven hard. A short, careful test drive can reveal whether the tires track cleanly and whether the car feels stable through braking and turning. Rechecking pressure afterward is a sensible final step.

Tires on a 2019 Audi A4 should be inspected regularly, not just when they appear worn. Routine checks should include tread condition, uneven wear, sidewall cuts, cracking, bulges, and any sign of slow air loss. Since the A4 can use lower-profile 18-inch and 19-inch fitments, visual condition and wheel protection deserve close attention.

Monthly checks are a practical habit, and another inspection makes sense before a longer trip or after striking potholes or rough pavement. Cars that are driven less often still need attention because age, storage conditions, and underinflation can create problems without high mileage. Consistent inspection helps preserve both tire life and the way the car drives.