2015 Audi A4 Tires

The 2015 Audi A4 uses three primary tire sizes: 245/45R17, 245/40R18, and 255/35R19. All three are radial sizes, but they do not apply across the entire model line in the same way, because fitment changes by sub-model and wheel package.

The most important step is confirming the actual wheel diameter on the car before selecting a tire. A Premium model may use 17-inch or 18-inch fitment, while certain Premium Plus and Prestige configurations move to 19-inch wheels, so the model name alone is not always enough to choose the correct size.

A 2015 Audi A4 may use 17-inch, 18-inch, or 19-inch rims, depending on the sub-model and wheel option. Those rim diameters match the three primary tire sizes used on this model: 245/45R17, 245/40R18, and 255/35R19.

Wheel diameter should be verified before looking at tread style, sidewall treatment, or brand. Measuring the current wheel or checking the existing tire sidewall is usually the fastest way to confirm what is on the car, especially if it has been changed from its original trim-level setup at some point.

The 2015 Audi A4 has more than one tire size because fitment varies by trim and by wheel package within certain trims. Premium models can use 245/45R17 or 245/40R18, while some Premium Plus and Prestige applications move to either 245/40R18 or 255/35R19.

That means tire selection starts with identifying the exact sub-model and then confirming the wheel diameter actually installed on the car. Once those two points are clear, the decision becomes much easier, because the buyer can compare the tires that match that specific size instead of guessing across the whole A4 range.

Start with the correct size for the car’s trim and wheel diameter, since the 2015 Audi A4 may use 245/45R17, 245/40R18, or 255/35R19. After that, compare construction details within the radial options, including intended use, sidewall appearance, rim-width specifications, and load figures where they are stated.

A buyer choosing for daily road use may focus on mainstream performance series, while someone after a more distinctive look may prefer redline or raised white letter styling in the correct size. It also helps to confirm whether the car has stock or aftermarket wheels, because wheel width can narrow the most sensible product choices.

Sidewall choices for the 2015 Audi A4 include blackwall, redline, and RWL, depending on the tire size selected. Blackwall options appear across all three primary sizes, while redline and RWL treatments are available in the 245/40R18 and 245/45R17 fitments.

That gives the A4 owner a real appearance decision once the correct size is confirmed. A blackwall tire keeps the presentation more understated, while redline or raised white letter styling creates a more custom look, so the right choice depends on whether the goal is subtle factory-inspired character or a more noticeable visual statement.

Tires for the 2015 Audi A4 are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, depending on the size. BFGoodrich appears across all three primary fitments, while Nitto, M&H Racemaster, and Pro-Trac are offered in selected 17-inch and 18-inch applications.

Brand alone should not be the only deciding factor. It makes more sense to narrow the choice by the exact tire size first, then compare the available series, sidewall styles, and rim-width compatibility within that size so the tire suits both the car’s setup and the owner’s intended use.

A period-style approach on a 2015 Audi A4 starts with keeping the correct modern radial size for the trim and wheel package already on the car. From there, the visual choice comes down to whether a blackwall performance presentation or a more stylized redline or RWL sidewall better suits the look being built.

Because this A4 is a modern enthusiast sedan rather than a vintage bias-ply application, maintaining the proper size and wheel relationship matters more than chasing a historic construction change. Owners who want the most authentic appearance for a specific package should compare the car’s current wheel setup with original vehicle documentation or marque-specific references.

On the 2015 Audi A4, the primary fitments are all radial, so construction does not create a bias-ply-versus-radial appearance decision. The visual difference comes more from the tire’s sidewall treatment, profile, and wheel diameter, since 17-inch, 18-inch, and 19-inch setups each give the car a slightly different stance.

That makes size accuracy especially important for an appearance-focused build. Choosing the correct 245/45R17, 245/40R18, or 255/35R19 fitment keeps the proportions aligned with the intended wheel package, while the sidewall style determines whether the finished look stays subtle in blackwall form or takes on a more customized character.

Yes, modifications can affect tire fitment on a 2015 Audi A4, especially if the car has aftermarket wheels, suspension changes, or altered ride height. Since this model already uses multiple factory-style wheel diameters, even a small change in wheel width or offset can influence how a tire sits in the wheelwell.

A modified A4 should be checked for wheel diameter, wheel width, and clearance at the fender, inner suspension area, and steering range before a new tire is chosen. That matters most when moving between 17-inch, 18-inch, and 19-inch setups, because the correct size on paper still needs to suit the actual hardware on the car.

Before driving a 2015 Audi A4 on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and check that all four tires are inflated properly for the car’s intended use. It is also wise to look over the valve stems, bead seating, and visible tread and sidewall condition.

A quick clearance check is just as important, especially on cars with 19-inch wheels or any non-stock suspension setup. Turn the steering from lock to lock, watch for rubbing around the fenders and inner liners, and make sure nothing contacts the tire once the car is back on the ground and loaded normally.

Before a longer drive in a 2015 Audi A4, check inflation pressure, inspect the tread and sidewalls for cuts or bulges, and verify that the tires are wearing evenly. An uneven pattern can point to alignment or suspension issues that become more noticeable over highway distance.

Cars that have seen wheel swaps or seasonal storage deserve an extra look at age-related cracking and any slow air loss before heading out. It also helps to confirm that the car is still wearing the correct 17-inch, 18-inch, or 19-inch tire size for its wheels so the trip starts with a sound fitment baseline.