The 2019 Audi S5 Sportback blends Audi’s fastback practicality with the sharper character expected from the S-badged lineup, making it a modern performance car that still has to balance style, grip, and everyday road manners. Tire choice on this model starts with identifying the exact wheel package, because the S5 Sportback uses 245/40R18, 255/35R19, or 265/30R20 radial fitments depending on sub-model. That means the real decision is not just size, but also sidewall style, tire series, and whether the car is staying close to a stock wheel setup. Careful fitment matters most when appearance packages or wheel changes enter the picture.
Which Tire Size Is Right for The 2019 Audi S5 Sportback
The 2019 Audi S5 Sportback uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel package. All three are radial metric fitments, but they span 18-inch, 19-inch, and 20-inch rims, so confirming the wheel diameter is the first step before comparing tire choices, sidewall treatments, or performance-oriented product lines.
245/40R18 is a modern metric radial size in which 245 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2019 Audi S5 Sportback, this size suits 18-inch wheel applications and keeps the selection focused on radial performance tires. Available choices include Blackwall, Redline, and RWL sidewall treatments from brands such as BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac across several tire series. It is the right size to evaluate when the car is equipped with the smaller factory-style wheel package.
255/35R19 is a metric radial size with a 255-millimeter nominal section width, a 35-series profile, and fitment for a 19-inch rim. For the 2019 Audi S5 Sportback, this size represents a larger wheel package than the 18-inch setup while remaining within the model’s primary radial fitments. Product choice here centers on Blackwall performance tires from BFGoodrich, with multiple g-Force series available. This size should be considered when the car has 19-inch wheels and the goal is to stay with the proper primary fitment rather than forcing an 18-inch or 20-inch alternative.
Fit(s): Premium Plus w/Black Optic Pkg. and Prestige w/Black Optic Pkg.
Construction: Radial|Rim: 20 in
265/30R20 is a metric radial size where 265 indicates nominal width in millimeters, 30 is the aspect ratio, R marks radial construction, and 20 identifies the rim diameter. On the 2019 Audi S5 Sportback, this size is tied to 20-inch wheel applications rather than the standard 18-inch or 19-inch setups. Its role is fitment-specific, so the main consideration is confirming that the car actually carries the 20-inch wheel package before shopping by appearance or performance preference. Buyers looking at this size should verify wheel diameter and overall setup first, especially on Black Optic Package cars.
Sub-model fitment on the 2019 Audi S5 Sportback is straightforward once the exact trim and wheel package are identified. Most covered sub-models use either 245/40R18 or 255/35R19, while Black Optic Package versions move to a dedicated 265/30R20 fitment.
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2019 Audi S5 Sportback Premium
The 2019 Audi S5 Sportback Premium uses either an 18-inch or 19-inch radial fitment rather than a single fixed size. Tire selection starts with confirming which wheel package is on the car, then narrowing choices by tread style, brand, and sidewall treatment where available.
The 2019 Audi S5 Sportback Premium Plus follows the same basic fitment pattern as the Premium, with 18-inch and 19-inch radial tire sizes used on this sub-model. The practical step is checking the existing wheel diameter before comparing available performance tire series within the correct size.
2019 Audi S5 Sportback Premium Plus w/Black Optic Pkg.
The 2019 Audi S5 Sportback Premium Plus w/Black Optic Pkg. uses a dedicated 20-inch radial fitment rather than sharing the 18-inch and 19-inch choices. That makes wheel confirmation especially important, since this setup points the buyer toward the correct size immediately and avoids confusion with the other S5 Sportback trims.
The 2019 Audi S5 Sportback Prestige uses the same two primary radial size paths found on several non-Black Optic trims, with either 18-inch or 19-inch wheels. Choosing the right tire depends on matching the wheel diameter first, then comparing the available tire series in that specific size.
2019 Audi S5 Sportback Prestige w/Black Optic Pkg.
The 2019 Audi S5 Sportback Prestige w/Black Optic Pkg. uses the 20-inch radial fitment associated with that appearance package. Tire shopping is simpler once that is confirmed, because the decision shifts from size identification to making sure the wheel setup remains correct and unchanged.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2019 Audi S5 Sportback Tires for Sale
Available 2019 Audi S5 Sportback tire choices focus on radial performance fitments, with BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac options in the supported sizes. Depending on size, buyers can compare tire series, Blackwall styling, and select Redline or RWL treatments.
Common questions for the 2019 Audi S5 Sportback center on identifying the right wheel-package size, understanding 18-inch versus 19-inch versus 20-inch fitment, and choosing among the available radial tire brands, series, and sidewall styles.
Tire Size & Fitment
What tire size fits a 2019 Audi S5 Sportback?
The 2019 Audi S5 Sportback uses three primary tire sizes: 245/40R18, 255/35R19, and 265/30R20. All are radial metric fitments, but they do not apply universally across every trim and wheel package, so the correct size depends on the exact sub-model and the wheel diameter currently on the car.
The most important step is matching the tire to the wheel package already fitted to the vehicle. A non-Black Optic car may use either 18-inch or 19-inch wheels, while Black Optic Package versions use a 20-inch fitment, so checking the wheel itself prevents ordering the right tire size for the wrong rim.
What size rim does a 2019 Audi S5 Sportback use?
A 2019 Audi S5 Sportback may use 18-inch, 19-inch, or 20-inch rims, depending on sub-model and wheel package. Those rim diameters correspond to the primary tire sizes 245/40R18, 255/35R19, and 265/30R20, so rim size and tire size need to match exactly.
Rim diameter should be confirmed before anything else because a correct-width tire on the wrong rim diameter is still the wrong fitment. It also helps to verify whether the car is still on its original wheel package, since aftermarket wheels or appearance-package changes can make the expected trim-level size less reliable than the wheel actually installed.
Why does the 2019 Audi S5 Sportback have more than one tire size?
The 2019 Audi S5 Sportback has more than one tire size because different trims and appearance packages use different wheel diameters. Standard and upscale trims can use either 18-inch or 19-inch fitments, while Black Optic Package versions move to a 20-inch setup with 265/30R20 tires.
That means trim name alone is helpful, but wheel confirmation is still essential. The right approach is to identify the exact sub-model, then verify the wheel diameter on the car before selecting a tire, especially if the vehicle has had wheel changes, cosmetic upgrades, or prior owner modifications that may not match the original package.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 Audi S5 Sportback?
Start with the correct primary size for the car’s actual wheel package: 245/40R18, 255/35R19, or 265/30R20. From there, compare radial construction details such as tire series, sidewall style, rim-width compatibility where stated, load figures where stated, and the kind of driving the car sees most often.
A street-driven S5 Sportback may call for a different product choice than a car aimed at appearance or occasional specialty use. It also helps to decide whether sidewall presentation matters, since 245/40R18 includes Blackwall, Redline, and RWL options, while other sizes on this application stay more narrowly focused on Blackwall performance tires.
What sidewall styles are available for 2019 Audi S5 Sportback tires?
Sidewall style depends on tire size. In 245/40R18, the available styles include Blackwall, Redline, and RWL, while the 255/35R19 options shown here are Blackwall tires. That makes the 18-inch fitment the broadest appearance choice within the S5 Sportback’s covered tire selection.
Sidewall styling should always come after confirming the correct size and wheel diameter. A Redline or raised white letter look can change the visual character of the car, but the tire still needs to match the installed rim and intended use, especially on a modern performance hatchback where wheel package drives the fitment decision.
What brands offer tires for the 2019 Audi S5 Sportback?
Available brands for the 2019 Audi S5 Sportback include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand selection varies by size, with the broadest range appearing in 245/40R18 and a more concentrated BFGoodrich selection appearing in 255/35R19.
Brand should be considered alongside size, tire series, and the kind of use the car will see. A buyer comparing options in 245/40R18 has more flexibility in sidewall appearance and specialty application, while a buyer in 255/35R19 is choosing more within a focused performance-oriented lineup than across a wide mix of presentation styles.
Restoration & Appearance
Which tire should I choose for a period-style 2019 Audi S5 Sportback?
A period-style approach on a 2019 Audi S5 Sportback still begins with using the correct primary tire size for the car’s wheel package. Because this is a late-model performance Audi with radial metric fitments, the appearance decision is usually less about vintage construction and more about selecting a tire whose sidewall look suits the car’s visual theme.
For a cleaner modern presentation, Blackwall options keep the look understated and close to what many owners expect on an S5 Sportback. If the car is built more for visual distinction than stock-style restraint, the available Redline or RWL treatment in 245/40R18 adds personality without changing the need to keep size and wheel fitment correct.
How does tire construction affect the appearance of a restored 2019 Audi S5 Sportback?
On the 2019 Audi S5 Sportback, 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, tire series character, and whether the car sits on 18-inch, 19-inch, or 20-inch wheels.
That makes wheel-and-tire proportion a major part of the finished look. A car on 245/40R18 can be styled with Blackwall, Redline, or RWL options, while the larger wheel fitments keep a more contemporary performance presentation, so the final appearance depends on both the selected tire and the wheel package already on the car.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Audi S5 Sportback?
Yes, modifications can affect tire fitment on a 2019 Audi S5 Sportback even when the tire size looks close to stock. Aftermarket wheels, altered offsets, suspension lowering, spacer use, or body changes can all influence how a 245/40R18, 255/35R19, or 265/30R20 tire sits within the wheelwell and steering range.
That is why actual wheel diameter alone is not the only measurement worth checking. Clearance at full steering lock, suspension travel, and the wheel’s width should be reviewed before mounting replacement tires, particularly if the car no longer matches its original trim-package setup or has been modified for appearance or handling.
What should I inspect before driving a 2019 Audi S5 Sportback on new tires?
Before driving a 2019 Audi S5 Sportback on new tires, confirm that the tire size matches the rim diameter and that each wheel is in sound condition. Tire pressure should be set correctly, and the tires should be checked for proper seating, visible damage, and any early signs of rubbing near the fenders or suspension components.
It also helps to look over the rest of the setup so the new tires are not being asked to compensate for worn hardware. Uneven wear patterns, alignment issues, bent wheels, or suspension wear can shorten tire life quickly, so a brief inspection after the first few miles is a sensible way to catch clearance or setup problems early.
How often should tires on a 2019 Audi S5 Sportback be inspected?
Tires on a 2019 Audi S5 Sportback should be inspected regularly, not just at replacement time. A quick visual check for cuts, bulges, punctures, sidewall damage, uneven wear, and pressure loss is worthwhile before longer drives, and a more thorough inspection should be part of normal maintenance intervals.
Performance-oriented fitments with lower-profile sidewalls can make wheel-condition and pressure checks especially important. Cars that sit for stretches between drives also benefit from periodic inspections because flat spotting, aging, or slow air loss can develop quietly, even when tread depth still looks serviceable at first glance.
