The 2019 Audi S3 sits in the modern compact sport-sedan class with Quattro traction, sharp road manners, and a factory personality that depends heavily on proper wheel and tire sizing. On this car, tire choice is tied directly to whether it is running the 18-inch or 19-inch setup, with primary fitments in 225/40R18 and 235/35R19 radial sizes. Available choices stay firmly in the performance-radial category, with blackwall options from BFGoodrich and Nitto across g-Force and NT555 G2 series. The key decision is confirming the wheel diameter already on the car, then choosing a tire that matches the intended balance of everyday street use, handling feel, and overall presentation.
Which Tire Size Is Right for The 2019 Audi S3
The 2019 Audi S3 uses two primary tire sizes, and the first step is confirming whether the car is equipped with 18-inch or 19-inch wheels. Both sizes are radial performance fitments used across the covered S3 sub-models, so the real choice comes down to matching the existing wheel diameter and then comparing tire series, brand, load-related specifications, and overall performance character within the correct size.
225/40R18 is a modern metric radial size in which 225 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. On the 2019 Audi S3, this size supports the car's sport-sedan balance while keeping the fitment tied to an 18-inch wheel. Available choices include BFGoodrich and Nitto blackwall tires across g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 lines. This size is the right place to start when the car already wears 18-inch wheels and the goal is to compare performance-oriented radial options within that setup.
235/35R19 is also a modern metric radial size, with a 235-millimeter nominal section width, a 35-series profile, radial construction, and a 19-inch rim diameter. For the 2019 Audi S3, this size belongs to the 19-inch wheel configuration and keeps the decision centered on the wheel package currently on the car. Product choices in this fitment include blackwall performance radials from Nitto and BFGoodrich, including the NT555 G2 and g-Force Phenom T/A series. It makes sense to evaluate this size when the S3 is already equipped with 19-inch wheels and the priority is preserving the intended low-profile performance fitment.
Tire fitment is straightforward across the covered 2019 Audi S3 sub-models because both use the same two radial size options. What matters most is confirming whether the car is on the 18-inch or 19-inch wheel setup before comparing tires.
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2019 Audi S3 Premium Plus
The 2019 Audi S3 Premium Plus uses the same two primary radial fitments found across the covered S3 range, so tire selection centers on wheel diameter rather than trim-specific sizing differences. Once the car's 18-inch or 19-inch setup is confirmed, the choice becomes comparing performance-oriented blackwall tires by brand and series.
The 2019 Audi S3 Prestige follows the same tire-fitment pattern, with both primary radial sizes associated with this sub-model. That means the practical step is verifying which wheel package is on the car, then choosing among the available performance radial options that match the existing setup.
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 S3 Tires for Sale
Available 2019 Audi S3 tire choices focus on 225/40R18 and 235/35R19 performance radials from BFGoodrich and Nitto. The main comparison points are tire series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, along with blackwall styling and rim-width compatibility.
Common 2019 Audi S3 tire questions usually come down to size, wheel diameter, trim-level fitment, and how to compare the available performance radial options before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2019 Audi S3?
The 2019 Audi S3 uses two primary tire sizes: 225/40R18 and 235/35R19. Both are radial fitments, and both appear across the covered Premium Plus and Prestige sub-models, so the deciding factor is not trim level alone but which wheel diameter is actually on the car.
A buyer should confirm the wheel size before selecting a tire, because an 18-inch tire and a 19-inch tire are not interchangeable. Checking the tire sidewall, wheel markings, or the car's current setup helps narrow the choice quickly, and it is also wise to verify that the S3 has not been changed with aftermarket wheels or other fitment-altering modifications.
What size rim does a 2019 Audi S3 use?
The 2019 Audi S3 uses either an 18-inch rim with 225/40R18 tires or a 19-inch rim with 235/35R19 tires. Both wheel diameters are part of the covered fitment range for this model year, and both are paired with modern radial performance tires.
Rim diameter is the first thing to verify because the tire must match it exactly. Beyond diameter, wheel width also matters when comparing specific tires, especially on a performance-oriented car like the S3, so it helps to confirm the actual wheel dimensions before choosing among available BFGoodrich and Nitto options in the correct size.
Do all 2019 Audi S3 sub-models use the same tire size?
The covered 2019 Audi S3 sub-models share the same two tire-size options rather than having separate trim-specific sizes. Both the Premium Plus and Prestige are associated with 225/40R18 and 235/35R19 radial fitments, so the trim name alone does not settle the tire decision.
That makes wheel verification more important than sub-model verification. A quick check of the current tire sidewall or wheel diameter will usually tell the story, and that matters especially on used S3s, where wheel packages may have been changed over time or replaced with aftermarket setups that affect what size should be selected next.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 Audi S3?
Start with the correct size for the wheel already on the car: 225/40R18 for an 18-inch setup or 235/35R19 for a 19-inch setup. From there, compare radial tire series, brand, rim-width suitability where stated, load-related specifications, and the type of street use the S3 will actually see.
A performance sedan responds noticeably to tire choice, so it helps to think beyond size alone. Some owners may want an all-season-oriented option in 225/40R18, while others may focus on a more performance-minded summer-style radial, and the right choice depends on climate, road use, and whether the car remains close to its original wheel and suspension setup.
What sidewall styles are available for 2019 Audi S3 tires?
The available tires for the covered 2019 Audi S3 fitments use a blackwall sidewall style. That keeps the look clean and contemporary, which suits the S3's modern sport-sedan character and aligns with the performance-focused nature of the available radial tire choices.
Since sidewall treatment is not the main point of variation here, the more meaningful comparisons are brand, tire series, and wheel compatibility. Once the correct 18-inch or 19-inch size is confirmed, attention can shift to whether a BFGoodrich g-Force line or a Nitto NT555 G2 better matches the car's intended street use and handling expectations.
What brands offer tires for the 2019 Audi S3?
BFGoodrich and Nitto both offer tires in the covered 2019 Audi S3 sizes. Across 225/40R18 and 235/35R19, the available product range includes BFGoodrich g-Force series tires and Nitto NT555 G2 options, all in radial blackwall form.
Brand alone should not make the final decision. It is better to compare the exact tire series in the correct size, along with any stated rim-width range, load information, and the kind of driving the car will do most often, because a daily-driven S3 and a more weekend-focused S3 may not call for the same tire emphasis.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Audi S3 restoration or preservation project?
Yes, correct tire fitment still matters on a 2019 Audi S3, even though it is a newer performance sedan than a traditional collector car. Keeping the proper 225/40R18 or 235/35R19 sizing helps preserve the car's stance, wheel-to-tire relationship, and the overall character intended by its original wheel package.
Owners interested in preserving the car's original presentation should start by confirming which wheel diameter belongs on their specific S3 and then choose a tire that maintains that setup cleanly. If exact historical presentation matters beyond basic fitment, vehicle-specific reference material and marque-focused guidance can help confirm the most appropriate wheel-and-tire combination.
How does tire choice affect the appearance of a 2019 Audi S3?
Tire choice has a visible effect on a 2019 Audi S3 because the car's styling depends on a low-profile performance look. Moving between 225/40R18 and 235/35R19 changes the wheel-and-sidewall relationship, while the available blackwall designs keep the appearance modern and performance-oriented rather than vintage or decorative.
The best visual result usually comes from matching the tire to the wheel diameter already on the car and avoiding mismatched substitutions. A clean, properly sized radial preserves the S3's sharp presentation, while incorrect sizing or an unsuitable wheel setup can alter how the car sits and may create avoidable clearance or handling concerns.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Audi S3?
Yes, modifications can affect tire fitment on a 2019 Audi S3. If the car has aftermarket wheels, altered wheel width, changed offset, suspension lowering, or body modifications, the original 225/40R18 and 235/35R19 fitments may no longer tell the whole story for real-world clearance and compatibility.
That means the current setup should be inspected before ordering replacement tires. Checking wheel diameter, wheel width, and visible clearance at the fenders and suspension helps prevent choosing a tire that matches the sidewall label but does not suit the car as it sits now, especially on an S3 that has been modified for appearance or handling.
What should I inspect before driving a 2019 Audi S3 on new tires?
Before driving a 2019 Audi S3 on new tires, inspect overall tire pressure, confirm the tire size matches the wheel diameter, and look over the wheels for damage or bent lips. It also helps to verify that the tires clear the fenders, suspension, and steering components without rubbing through the full range of motion.
A second check after the first short drive is worthwhile on a performance sedan, especially if the car has changed hands or has aftermarket parts. Uneven wear, vibration, or contact marks can point to alignment issues, wheel problems, or setup changes that should be corrected before the S3 sees extended highway or spirited road use.
How often should tires on a 2019 Audi S3 be inspected?
Tires on a 2019 Audi S3 should be inspected regularly, not just when tread looks low. A quick visual check for cuts, bulges, cracking, punctures, uneven wear, and pressure loss is smart before routine driving, and a more thorough inspection makes sense before longer trips or after the car has been stored.
Performance-oriented low-profile tires can show the effects of alignment issues, pothole impacts, and underinflation sooner than taller sidewall tires. Consistent inspection helps catch problems early, and it is especially important if the S3 sees seasonal use, sits for stretches, or runs on wheels and suspension settings that differ from a standard street setup.
