The 2014 Audi S6 blends executive-sedan refinement with the understated performance character that defines Audi’s modern S cars. It sits in the era when big power, all-weather confidence, and large-diameter wheel packages became central to the sport-luxury formula. For this exact model, tire selection centers on two radial fitments, 255/35R20 and 255/40R19, both tied to the S6’s 27.03-inch overall tire diameter but different wheel diameters. Available choices range from blackwall performance-oriented designs to RWL and redline treatments in select series. The real task is confirming whether the car is on 19-inch or 20-inch wheels, then choosing the tire style and series that best match appearance and road use.
Which Tire Size Is Right for The 2014 Audi S6
The 2014 Audi S6 uses two primary tire sizes, and the first step is confirming wheel diameter. Both sizes are radial fitments used on the S6 Base and share the same published overall diameter, but one is built for a 19-inch rim and the other for a 20-inch rim. Once that is confirmed, the decision shifts to tire series, sidewall style, and the balance between modern performance character and appearance.
A 255/35R20 tire uses a 255-millimeter section width, a 35-series aspect ratio, radial construction, and a 20-inch rim. On the 2014 Audi S6, this is a modern low-profile fitment that keeps the car in its large-wheel sport-sedan presentation. Available choices include BFGoodrich, Nitto, and Pro-Trac, with blackwall, RWL, and redline sidewall treatments across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, NT555 G2, and Street Pro III. This size is the right path only after confirming the car is actually equipped with 20-inch wheels.
A 255/40R19 tire uses the same 255-millimeter section width but a taller 40-series profile on a 19-inch rim. For the 2014 Audi S6, it preserves the same published overall diameter as the 20-inch fitment while matching a different wheel package. BFGoodrich and Pro-Trac offer choices in this size, including blackwall, RWL, and redline styles, with series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Street Pro III. This is the correct direction when the car is on 19-inch wheels and the buyer wants to compare style and performance-oriented series within that format.
Fitment is straightforward here because the covered sub-model shares the same two tire-size paths. The only real distinction is wheel diameter, so confirming whether the car carries 19-inch or 20-inch wheels matters more than trim identification.
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2014 Audi S6 Base
The 2014 Audi S6 Base uses both 255/35R20 and 255/40R19 radial tire fitments, depending on the wheel package on the car. Tire selection starts with wheel-diameter confirmation, then moves to comparing available series and sidewall treatments within the correct size.
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 S6 Tires for Sale
Available 2014 Audi S6 tires center on 255/35R20 and 255/40R19 radial fitments from BFGoodrich, Nitto, and Pro-Trac. The product grid gives useful contrast in tire series, blackwall versus RWL or redline sidewalls, and rim-width compatibility where stated.
These FAQs focus on the exact tire sizes used on the 2014 Audi S6, how to confirm the correct rim fitment, and how to compare available radial tire series, sidewall styles, and road-use considerations.
Tire Size & Fitment
What tire size fits a 2014 Audi S6?
The 2014 Audi S6 uses two tire sizes: 255/35R20 and 255/40R19. Both are radial fitments, and both are used on the S6 Base depending on the wheel package installed on the car.
Choosing the right one starts with the wheel itself, not the body or trim badge. A 20-inch wheel requires 255/35R20, while a 19-inch wheel requires 255/40R19. Checking the current wheel diameter, the tire size already mounted, and any past wheel changes is the safest way to sort out which fitment belongs on the car.
What size rim does a 2014 Audi S6 use?
A 2014 Audi S6 can use either a 19-inch rim or a 20-inch rim, depending on which tire size is on the car. The 255/40R19 fitment matches a 19-inch rim, and the 255/35R20 fitment matches a 20-inch rim.
That difference is important because the two tire sizes share the same published overall diameter, but they are not built for the same wheel diameter. Before replacing tires, confirm the actual wheel size stamped on the rim or verify the size on the tire sidewall, especially if the car may have had aftermarket wheel changes at some point.
Why does the 2014 Audi S6 have more than one tire size?
The 2014 Audi S6 has more than one tire size because it was fitted with two different wheel-diameter combinations: 255/40R19 on a 19-inch rim and 255/35R20 on a 20-inch rim. Both belong to the same S6 Base sub-model.
This is not a case of one size being universally better than the other. It simply means tire replacement has to match the wheel package currently on the car. Since both sizes carry the same published overall diameter, the practical decision is less about overall height and more about selecting the correct rim diameter, then comparing available tire series and sidewall styles.
Choosing the Right Tire
What should I consider when choosing a 255/35R20 tire for a 2014 Audi S6?
Start with the basic fitment points: the car must be on 20-inch wheels, and the tire should remain in the 255/35R20 size. From there, selection comes down to the available radial tire series, sidewall appearance, and whether the tire’s rim-width specification suits the wheel on the car.
This size is available in blackwall designs from BFGoodrich and Nitto, along with RWL and redline versions from Pro-Trac. Some 255/35R20 products are built for 8.5- to 10-inch rim widths, so wheel width is worth verifying before choosing among g-Force, NT555 G2, Phenom T/A, or Street Pro III options.
What sidewall styles are available for 2014 Audi S6 tires?
The 2014 Audi S6 tire options include blackwall, RWL, and redline sidewall styles, depending on the size and tire series selected. Those choices appear in both 255/35R20 and 255/40R19 product offerings.
Blackwall keeps the look closest to a contemporary sport-sedan presentation, while RWL and redline add more visual character. The right choice depends on whether the goal is a restrained modern appearance or something with a stronger custom accent. Sidewall style should always be a secondary decision after confirming the correct tire size and wheel diameter.
What brands offer tires for the 2014 Audi S6?
Tires for the 2014 Audi S6 are available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in both 19-inch and 20-inch fitments, Nitto is offered in 255/35R20, and Pro-Trac appears in both sizes with more appearance-focused sidewall choices.
Brand alone should not be the whole decision. It helps to compare the exact series within the correct size, such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, NT555 G2, or Street Pro III, then match that choice to the wheel diameter, intended use, and preferred sidewall presentation.
Restoration & Appearance
Which tire should I choose for a period-style 2014 Audi S6?
A period-style 2014 Audi S6 generally points toward staying with the correct modern radial size already matched to the car’s wheel diameter, either 255/35R20 or 255/40R19. Within those sizes, blackwall options usually maintain the cleaner late-model sport-sedan look most closely associated with the S6’s original era.
The key is preserving the right overall visual balance rather than chasing a vintage restoration formula. Since this is a modern performance sedan, wheel diameter, tire profile, and sidewall treatment all shape the appearance. A buyer focused on an era-appropriate presentation should confirm the wheel setup first, then choose a tire series and sidewall style that do not fight the car’s contemporary design.
How does tire construction affect the appearance of a restored 2014 Audi S6?
On a 2014 Audi S6, construction is straightforward because the applicable primary fitments are radial. That means the visible appearance difference comes less from bias-ply versus radial construction and more from profile, wheel diameter, and sidewall style within the correct radial size.
A 19-inch setup with 255/40R19 presents a slightly fuller sidewall look than a 20-inch setup with 255/35R20, even though both share the same published overall diameter. Blackwall, RWL, and redline versions also change the visual character. For an appearance-conscious project, staying faithful to the car’s actual wheel package matters more than chasing a construction change that does not apply here.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Audi S6?
Yes. Modifications can affect tire fitment on a 2014 Audi S6 even when the tire size looks correct on paper. Aftermarket wheels, changes in wheel width, altered offset, lowering, or suspension changes can all change how a 255/35R20 or 255/40R19 tire sits in the fender and steering space.
That is why replacement should begin with the car’s actual current setup, not assumptions about a stock configuration. Check wheel diameter and width, inspect inner and outer clearance, and look for signs of rubbing at full steering lock or suspension compression. A tire that suits one S6 may need extra scrutiny on another if the wheel or suspension package has changed.
What should I inspect before driving a 2014 Audi S6 on new tires?
Before driving a 2014 Audi S6 on new tires, confirm that all four tires match the correct size for the wheels, the beads are properly seated, and inflation is set appropriately for the installation. It is also wise to inspect the wheels for damage and make sure valve stems and balancing were handled correctly.
A short first drive should include attention to vibration, pulling, unusual noise, or any sign of contact in the wheelwell. Recheck pressure after the tires have settled, and look again for clearance around suspension and brake components. On a performance sedan with low-profile tires, small fitment issues tend to show up quickly and should not be ignored.
How often should tires on a 2014 Audi S6 be inspected?
Tires on a 2014 Audi S6 should be inspected regularly, not only by mileage but also by time and condition. A quick visual check every few weeks is sensible, with closer inspection for tread wear, cuts, punctures, sidewall damage, and uneven wear patterns that may point to alignment or suspension issues.
Cars that are driven less often still need attention because age, temperature changes, and long stationary periods can affect tires even when tread depth looks fine. Pressure should be checked routinely, especially before longer drives. Catching wear or air-loss issues early is particularly important on 255-section low-profile tires, where ride quality and handling can change noticeably.
