2019 Audi S5 Tires

A 2019 Audi S5 uses one of three primary tire sizes: 245/40R18, 255/35R19, or 265/30R20. All are radial sizes, and the correct fitment depends on the exact sub-model and wheel package rather than the S5 name alone.

The most important check is the wheel diameter currently on the car. Several trims can use more than one factory-style size, so matching the replacement tire to the installed 18-inch, 19-inch, or 20-inch wheel setup is more important than assuming every 2019 S5 uses the same tire.

The 2019 Audi S5 uses 18-inch, 19-inch, or 20-inch rims, depending on the sub-model and wheel package. Those rim diameters correspond to the primary tire sizes 245/40R18, 255/35R19, and 265/30R20.

Reading the last number in the tire size is the simplest way to confirm rim diameter, since 18, 19, and 20 in those size codes refer to wheel size in inches. Before ordering replacement tires, verify the wheels actually installed on the car, especially if the S5 has had wheel upgrades or package-related changes.

The 2019 Audi S5 has more than one tire size because fitment changes with trim level and wheel package. Some coupes use either 18-inch or 19-inch setups, while certain Black Optic Package coupes use 20-inch fitment, and some cabriolet trims can use all three sizes.

That variation means the right replacement tire is tied to the actual wheels on the vehicle, not just the model badge. Looking at the door-jamb placard, the existing tire sidewall, and the wheel diameter together is the best way to avoid choosing a tire that matches the S5 generally but not the exact car.

A 245/40R18 tire for a 2019 Audi S5 should first match the car’s 18-inch wheel setup, then be compared by construction details, intended use, and appearance. Available choices include blackwall performance tires along with redline and raised white letter options in this size.

Buyers using the S5 as a modern street car may focus on performance-oriented radial series, while an owner looking for a more distinctive visual presentation may prefer one of the specialty sidewall treatments. Rim-width specifications, load figures, and the car’s actual wheel setup are all worth checking before making a final choice.

Sidewall style depends on the tire size selected for the 2019 Audi S5. In 245/40R18, available styles include blackwall, redline, and raised white letter, while the 255/35R19 options shown here are blackwall performance tires.

That makes sidewall appearance part of the selection process, especially for owners who want something less understated than a standard blackwall. The key is to start with the correct tire size for the specific S5 trim and wheel diameter, then compare appearance choices only within that confirmed fitment.

Tires for the 2019 Audi S5 are available here from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand availability depends on tire size, with the broadest spread of choices appearing in the 245/40R18 fitment.

Brand alone should not drive the decision. It is more useful to compare the correct size first, then look at tire series, sidewall style, rim-width compatibility, and the kind of driving the car sees, whether that means regular street use, a more aggressive performance focus, or a more customized visual presentation.

A period-style approach on a 2019 Audi S5 starts with keeping the correct wheel diameter and tire size already associated with the car, whether that is 245/40R18, 255/35R19, or 265/30R20. Since the S5 is a modern performance grand tourer, the visual decision is usually more subtle than on older collector cars.

For a more restrained factory-inspired look, many owners stay with blackwall radial tires in the proper size. If the car is being customized rather than preserved in a stock-style presentation, the 245/40R18 fitment also opens the door to more distinctive sidewall treatments that change the car’s visual character without changing its basic size category.

On a 2019 Audi S5, tire construction does not create a bias-ply versus radial appearance decision because the primary fitments are radial. The visual difference comes more from sidewall treatment, wheel diameter, and tire profile than from switching between vintage construction types.

That means appearance planning should focus on whether the car keeps its 18-inch, 19-inch, or 20-inch setup and whether a blackwall or more expressive sidewall style suits the build. Keeping the right size for the exact wheel package helps the S5 retain the balanced, modern stance intended by its original fitment range.

Yes, modifications can affect tire fitment on a 2019 Audi S5. Wheel changes, altered offsets, suspension lowering, or body and brake upgrades can all influence whether a 245/40R18, 255/35R19, or 265/30R20 tire still has the right clearance and wheel support.

Even when the tire size matches one used elsewhere in the S5 range, the actual setup on the car is what matters. A modified car should be checked for steering clearance, fender clearance, and proper wheel width before replacement, especially when moving between 18-inch, 19-inch, and 20-inch combinations.

Before driving a 2019 Audi S5 on new tires, inspect wheel condition, confirm the tire size matches the installed rim diameter, and verify that inflation is correct for the vehicle setup. It is also wise to look over suspension and alignment condition so the new tires start life evenly.

A short, careful first drive can help reveal rubbing, vibration, or steering issues that were not obvious at rest. After installation, recheck air pressure and look for any clearance problem at full steering lock, particularly on cars with 20-inch wheels or any aftermarket wheel and suspension changes.

Tires on a 2019 Audi S5 should be inspected regularly, not just when tread appears low. A quick visual check for cuts, punctures, uneven wear, sidewall damage, and air loss is a good habit before longer drives and during routine maintenance.

Performance-oriented fitments with shorter sidewalls can make wheel damage or alignment wear more noticeable, so it helps to stay ahead of small issues. Cars that sit for long periods also deserve extra attention for flat spotting, pressure loss, and age-related deterioration before being put back into regular road use.