The 2012 Audi S4 sits in the modern sport-sedan sweet spot, blending understated luxury with supercharged performance and the all-weather confidence that made the S badge especially appealing in everyday driving. That mix of refinement and grip makes tire choice more than a cosmetic decision on this car. The 2012 Audi S4 uses radial tires in two primary sizes, 245/40R18 and 255/35R19, depending on trim and wheel setup. Available choices range from blackwall performance tires to redline and raised white letter options in 18-inch fitment. The right selection starts with confirming the exact sub-model and wheel diameter, then matching the tire to the car's intended look and road use.
Which Tire Size Is Right for The 2012 Audi S4
The 2012 Audi S4 uses two primary tire sizes, and the first step is confirming both the exact sub-model and the wheel diameter on the car. Premium Plus models can use either 245/40R18 or 255/35R19, while Prestige models use 255/35R19. Since both fitments are radial but use different rim diameters, choosing correctly starts with the wheel rather than the tire brand or sidewall style.
245/40R18 is a modern metric radial size in which 245 identifies section width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 18 is the rim diameter in inches. On the 2012 Audi S4, this size supports an 18-inch wheel setup and keeps the selection focused on modern radial performance. Available options include blackwall tires from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, along with redline and raised white letter choices in the Street Pro III series. This size is the one to evaluate when the car has 18-inch wheels and the goal is to balance correct fitment with either a clean performance look or a more distinctive sidewall treatment.
255/35R19 is a modern metric radial size with a 255-millimeter nominal section width, a 35-series profile, radial construction, and a 19-inch rim diameter. For the 2012 Audi S4, it belongs to the 19-inch wheel fitment used on Prestige models and on some Premium Plus cars. The available choices in this size center on BFGoodrich performance-oriented series, all in blackwall form, with rim-width compatibility aimed at wider 19-inch wheels. This is the size to confirm when the car is already equipped with 19-inch wheels and the priority is staying with the proper diameter and profile for that setup.
Sub-model fitment matters on the 2012 Audi S4 because tire size changes with trim and wheel package. Premium Plus can appear with either 18-inch or 19-inch fitment, while Prestige stays with the 19-inch setup, so checking the exact sub-model and wheel diameter avoids ordering the wrong size.
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2012 Audi S4 Premium Plus
The 2012 Audi S4 Premium Plus can use either 245/40R18 or 255/35R19, both in radial construction. Tire selection for this trim starts with confirming whether the car is on 18-inch or 19-inch wheels, then comparing the available performance-focused products and sidewall treatments within that exact size.
The 2012 Audi S4 Prestige uses the 255/35R19 radial fitment. That keeps the decision centered on choosing among the available 19-inch blackwall performance tires and making sure the wheel width and overall setup still match the tire being considered.
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 2012 Audi S4 Tires for Sale
Available 2012 Audi S4 tire choices center on radial performance tires in 245/40R18 and 255/35R19. Buyers can compare BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac options by tire series, blackwall versus redline or raised white letter styling in 18-inch fitment, and wheel-width compatibility.
Common 2012 Audi S4 tire questions usually come down to exact size by trim, 18-inch versus 19-inch wheel fitment, available radial tire choices, sidewall styling in 245/40R18, and the checks worth making before road use.
Tire Size & Fitment
What tire size fits a 2012 Audi S4?
The 2012 Audi S4 uses two primary tire sizes: 245/40R18 and 255/35R19. Both are radial fitments. Premium Plus models can use either size, while Prestige models use 255/35R19.
The practical difference is wheel diameter. A 245/40R18 belongs on an 18-inch wheel, and a 255/35R19 belongs on a 19-inch wheel. Before choosing a tire, confirm the exact trim and then check the wheels currently on the car, especially if it may have been changed from its original wheel package.
What size rim does a 2012 Audi S4 use?
A 2012 Audi S4 uses either an 18-inch or 19-inch rim, depending on the tire size and trim configuration. The 245/40R18 fitment uses an 18-inch rim, while the 255/35R19 fitment uses a 19-inch rim.
Rim diameter needs to match the tire exactly, so the first check is the wheel itself rather than the tire brand. Wheel width also matters once diameter is confirmed, since the available products in these sizes are built around specific width ranges that should suit the wheel and the car's intended use.
Do all 2012 Audi S4 sub-models use the same tire size?
No. The 2012 Audi S4 does not use one tire size across every covered sub-model. Premium Plus can use 245/40R18 or 255/35R19, while Prestige uses 255/35R19.
That means trim level alone may not be enough on a Premium Plus car, because wheel diameter still has to be verified. Checking the existing tire sidewall or measuring the wheel is the safest starting point. Once the correct size is confirmed, the choice shifts to tire series, sidewall appearance, and wheel-width compatibility.
Choosing the Right Tire
What should I consider when choosing a 2012 Audi S4 tire?
Start with the correct size for the car's trim and wheel diameter: 245/40R18 for an 18-inch setup or 255/35R19 for a 19-inch setup. From there, compare radial construction details, rim-width compatibility, tire series, sidewall styling, and any load information that appears with the product.
A buyer focused on a clean modern performance look may stay with blackwall options, while someone using the 18-inch size has added appearance choices such as redline or raised white letter. Intended use matters too, since the available lineup includes both street-oriented performance tires and a drag-focused radial in 245/40R18.
What sidewall styles are available for 2012 Audi S4 tires?
Sidewall style depends on the tire size. In 245/40R18, the available choices include blackwall, redline, and RWL, which is a raised white letter sidewall. In 255/35R19, the available products are blackwall.
That makes the 18-inch fitment the more flexible choice for buyers who want to add some visual character without moving away from the correct basic size. A 19-inch S4 stays more straightforward in appearance, so the decision there is less about sidewall presentation and more about selecting the preferred performance-oriented tire series.
What brands offer tires for the 2012 Audi S4?
Available 2012 Audi S4 tires come from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand choice varies by size, with the widest mix appearing in 245/40R18 and the 255/35R19 selection centered on BFGoodrich offerings.
The key is not choosing a brand first and then forcing the fitment. Confirm the exact tire size and wheel diameter, then compare each brand's tire series, sidewall style, and wheel-width suitability within that size. That approach keeps the selection process grounded in fitment and in the kind of driving or appearance the car is meant to have.
Restoration & Appearance
Which tire should I choose for a period-style 2012 Audi S4?
A period-style 2012 Audi S4 tire choice starts with the correct modern radial size for the car's actual wheel setup. For an 18-inch Premium Plus configuration, 245/40R18 offers the broadest appearance range, while 255/35R19 keeps a more contemporary performance presentation on 19-inch cars.
Appearance usually comes down to sidewall treatment and overall character rather than vintage-style construction, since this S4 uses radial fitments. Blackwall keeps the look restrained and contemporary, while redline or raised white letter options in 245/40R18 create a more expressive visual statement. Buyers pursuing exact showroom-era presentation should also compare against original sales literature or marque-specific references.
How does tire construction affect the appearance of a restored 2012 Audi S4?
On a 2012 Audi S4, construction is less of a vintage-versus-modern question because the primary fitments are already radial. The visual difference comes more from tire profile, size, and sidewall treatment than from choosing between bias-ply and radial construction.
That means a restoration-oriented owner should focus on keeping the proper 18-inch or 19-inch fitment and selecting a sidewall style that suits the car's intended presentation. Blackwall reads closest to the understated sport-sedan character many buyers expect, while redline or raised white letter in 245/40R18 can push the appearance in a more custom direction.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2012 Audi S4?
Yes. Modifications can change how a tire fits on a 2012 Audi S4 even when the basic size appears correct. Aftermarket wheels, different wheel widths, altered offsets, suspension changes, or lowered ride height can all affect clearance and the way an 18-inch or 19-inch tire sits on the car.
That matters most when the car no longer matches its original wheel setup. A modified S4 should have its wheel diameter, wheel width, and clearance around the fenders and suspension checked before a new tire is chosen. Fitment should also be confirmed at full steering lock and through normal suspension movement rather than by size code alone.
What should I inspect before driving a 2012 Audi S4 on new tires?
Before driving a 2012 Audi S4 on new tires, inspect the wheels for correct diameter and condition, confirm proper inflation, and look for any obvious interference around the suspension and fenders. It also helps to verify that the tire size on the car matches the wheel package it is actually using.
A short initial road check is worthwhile after installation. Pay attention to any rubbing, vibration, or unusual steering feel, then recheck pressure after the tires have settled in. Since this model uses low-profile radial sizes, keeping the wheels straight and the alignment in good order is especially important for even wear and consistent road manners.
What should I check before a longer drive in a 2012 Audi S4?
Before a longer drive, check tire pressure, tread condition, and the sidewalls for cuts, bulges, or cracking. A 2012 Audi S4 should also have its wheel and tire sizes confirmed so the car is running a matched setup that suits its 18-inch or 19-inch wheels.
Longer highway use puts more importance on condition than a quick local trip. It is wise to look for slow air loss, uneven wear, or signs of contact inside the wheelwell, especially on a car with aftermarket wheels or suspension changes. A collector or low-use S4 also benefits from an age and condition check even when tread depth still looks acceptable.
