The 2014 Audi S4 sits in the sweet spot of the supercharged sport sedan era, blending understated Audi styling with all-weather grip and a chassis that rewards precise tire choice. Buyers usually encounter it as a modern enthusiast car rather than a restoration project, which makes correct sizing and wheel confirmation especially important. This S4 uses radial fitments in either 245/40R18 or 255/35R19, depending on the wheel setup. Available choices range from performance-oriented blackwall radials to redline and raised white letter options in 18-inch form. The real decision is matching the tire to the car's actual wheel diameter, intended road use, and preferred appearance.
Which Tire Size Is Right for The 2014 Audi S4
The 2014 Audi S4 uses two primary tire sizes, and the first thing to confirm is whether the car is riding on 18-inch or 19-inch wheels. Both fitments are radial, and both appear across Premium Plus and Prestige trims, so tire selection starts with wheel diameter and then moves to construction details, performance character, and sidewall style.
In 245/40R18, the 245 identifies the tire's nominal section width in millimeters, 40 is the aspect ratio, R marks radial construction, and 18 is the rim diameter in inches. On the 2014 Audi S4, this is a modern low-profile radial fitment suited to 18-inch wheel setups. Available choices include blackwall performance tires from BFGoodrich, Nitto, and M&H Racemaster, along with Pro-Trac Street Pro III options in redline and raised white letter form. This size is worth considering when the car has 18-inch wheels and the owner wants either a contemporary blackwall look or a more distinctive sidewall treatment.
In 255/35R19, the 255 is the nominal section width in millimeters, 35 is the aspect ratio, R indicates radial construction, and 19 identifies the wheel diameter. For the 2014 Audi S4, this size belongs to 19-inch wheel applications and keeps the same modern performance-oriented sizing language as the 18-inch option. Current choices center on blackwall BFGoodrich tires across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. This size makes sense for owners confirming a 19-inch setup and comparing tire series within the correct wheel diameter rather than changing the basic fitment format.
Fitment is straightforward across the covered 2014 Audi S4 sub-models because both Premium Plus and Prestige can use the same two radial tire sizes. The important step is confirming whether the car has the 18-inch or 19-inch wheel setup before comparing tires.
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2014 Audi S4 Premium Plus
The 2014 Audi S4 Premium Plus can use either of the model's two primary radial tire sizes, so the trim itself does not narrow the choice to one fitment. Tire selection comes down to verifying the wheel diameter on the car and then choosing among the available performance series and sidewall treatments.
The 2014 Audi S4 Prestige follows the same basic fitment pattern, with both primary radial sizes appearing on this sub-model as well. That keeps the focus on confirming the actual wheel setup and comparing the available tires by series, sidewall style, and intended use.
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 2014 Audi S4 Tires for Sale
Available 2014 Audi S4 tires center on radial performance choices 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, and wheel-width compatibility.
These 2014 Audi S4 tire FAQs focus on the two factory-format radial sizes, wheel-diameter confirmation, available brands and sidewall styles, and the fitment checks that matter before regular road use.
Tire Size & Fitment
What tire size fits a 2014 Audi S4?
The 2014 Audi S4 uses two primary tire sizes: 245/40R18 and 255/35R19. Both are radial fitments, and both appear across the S4 lineup, including Premium Plus and Prestige trims. The correct choice depends on the wheel diameter actually installed on the car rather than the trim name alone.
A quick wheel check matters because an 18-inch tire cannot be mounted on a 19-inch wheel, and the reverse is also true. Before choosing a tire, confirm the wheel diameter stamped on the wheel or shown on the current tire, then compare the available series, sidewall styles, and wheel-width recommendations within that exact size.
What size rim does a 2014 Audi S4 use?
A 2014 Audi S4 uses either an 18-inch or 19-inch rim, depending on which of its two tire sizes is on the car. The 245/40R18 fitment belongs to an 18-inch wheel, while the 255/35R19 fitment belongs to a 19-inch wheel. Both are modern radial applications.
Wheel diameter is the first fitment check because it determines which tire size family you can use at all. After that, it is smart to confirm wheel width as well, especially if the car has aftermarket wheels, since several available tires include wheel-width guidance that can affect how well a particular tire matches the setup.
Do all 2014 Audi S4 sub-models use the same tire size?
Premium Plus and Prestige versions of the 2014 Audi S4 follow the same overall fitment pattern: both can use 245/40R18 or 255/35R19. That means the sub-model alone does not lock the car into one tire size. The deciding factor is the wheel package on the specific car.
This is helpful for buyers because the search does not need to stop at the trim badge. Instead, inspect the car's current wheel and tire combination, especially if it has changed hands or been modified, then choose tires in the matching size and compare series, sidewall appearance, and intended road use within that fitment.
Choosing the Right Tire
What should I consider when choosing a 245/40R18 or 255/35R19 tire for a 2014 Audi S4?
Start with the correct size for the wheel on the car, since the 2014 Audi S4 uses either 245/40R18 or 255/35R19. From there, compare tire series, sidewall style, radial construction details, wheel-width compatibility, and any product attributes that match how the car is actually driven.
A buyer looking for a straightforward modern appearance may stay with blackwall performance tires, while someone wanting a more distinctive look in 18-inch fitment may consider redline or raised white letter options. It also helps to review load figures, product weight, and whether the car remains on stock wheels before settling on one tire within the correct size.
What sidewall styles are available for 2014 Audi S4 tires?
Sidewall choice depends on size. In 245/40R18, available styles include blackwall, redline, and RWL, which can be described as raised white letter. In 255/35R19, the available options are blackwall. All of these choices are radial tires for the 2014 Audi S4.
That gives the 18-inch fitment more visual variety, especially for owners who want something less understated than a conventional blackwall. The 19-inch fitment stays more focused on modern performance presentation, so appearance choice there is narrower. Matching the sidewall look to the car's wheel design and overall style usually makes the decision easier.
What brands offer tires for the 2014 Audi S4?
Available brands for the 2014 Audi S4 include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, depending on tire size. The broadest brand mix appears in 245/40R18, while 255/35R19 centers on BFGoodrich offerings. All of these choices are radial tires in modern performance-oriented sizing.
Brand matters most when it is tied to the exact size and style you want. An 18-inch buyer can compare more brands and sidewall treatments, while a 19-inch buyer is comparing more within tire series than across a wide brand spread. It is worth narrowing the search by wheel diameter first, then by appearance and intended use.
Restoration & Appearance
Which tire should I choose for a period-style 2014 Audi S4?
A period-style choice for a 2014 Audi S4 usually starts with keeping the correct modern radial size and matching it to the wheel diameter already on the car. Since this is a contemporary sport sedan rather than an earlier collector-era restoration, the most natural visual approach is often a blackwall tire in 245/40R18 or 255/35R19.
Owners who want a more custom presentation have additional room to experiment in 245/40R18, where redline and raised white letter options are available. The key is to treat appearance as a secondary decision after size and wheel compatibility are confirmed, especially on a car whose styling depends heavily on proportion and wheel-to-tire balance.
How does tire construction affect the appearance of a restored 2014 Audi S4?
On a 2014 Audi S4, construction does not create a bias-ply versus radial appearance decision because the available primary fitments are radial. Visual character comes more from sidewall treatment, tire series, and the wheel diameter the car is using. In practical terms, that means the 18-inch fitment offers more noticeable style variation.
A blackwall tire keeps the look closest to the understated sport-sedan presentation many buyers expect from this generation of S4. Redline or raised white letter versions in 245/40R18 shift the look toward a more customized appearance. Anyone pursuing a highly exact visual restoration should also compare the final tire look against period photos and original delivery literature.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Audi S4?
Yes. Modifications can change tire fitment on a 2014 Audi S4 even when the tire size itself looks correct on paper. Aftermarket wheels, altered wheel width, suspension changes, ride-height adjustments, or body modifications can all affect how a 245/40R18 or 255/35R19 tire sits and clears the car.
A modified S4 should be checked for wheel diameter, wheel width, tire-to-fender clearance, and steering clearance before a new tire is selected. That is especially important when moving between stock-style and custom wheel setups. A tire that matches the nominal size still needs to suit the actual wheel and available space on the specific car.
What should I inspect before driving a 2014 Audi S4 on new tires?
Before driving a 2014 Audi S4 on new tires, inspect wheel condition, verify the tire size against the wheel diameter, and confirm that inflation pressure matches the tire being used. It is also smart to check for suspension wear, alignment issues, and any signs that the previous tires were rubbing or wearing unevenly.
Once the tires are mounted, look closely at clearance near the fenders, inner liners, and steering components through the full steering range. A short, careful road test can reveal vibration, pulling, or contact that is easier to correct early. That kind of inspection matters even more if the car has changed wheels or suspension components over time.
How often should tires on a 2014 Audi S4 be inspected?
Tires on a 2014 Audi S4 should be inspected regularly, not just when tread looks low. Frequent checks for air loss, uneven wear, cuts, bulges, and sidewall damage help catch issues early, especially on a performance sedan that may put more demand on its tires than a basic commuter car.
A practical habit is to inspect them during routine pressure checks and again before longer drives. Cars that sit for extended periods also deserve extra attention because age, storage conditions, and flat-spotting can become concerns even when tread depth still appears usable. Consistent inspection helps protect both fitment quality and road manners.
