The 2013 Audi S6 sits in the modern super-sedan sweet spot, blending understated executive styling with the kind of performance that puts real demands on its tires. It is a car that rewards precise steering response, strong grip, and a tire profile that suits its factory wheel package. The 2013 Audi S6 uses radial tire fitments in two sizes, 255/35R20 and 255/40R19, both tied to different wheel diameters. Available choices include blackwall, raised white letter, and redline sidewall treatments across several performance-oriented series. The key is confirming whether the car is on 19-inch or 20-inch wheels before comparing style, load, and road-use priorities.
Which Tire Size Is Right for The 2013 Audi S6
The 2013 Audi S6 uses two primary tire sizes, and the difference comes down to wheel diameter rather than overall tire height. Both fitments are radial, with 255/35R20 used on 20-inch wheels and 255/40R19 used on 19-inch wheels. Since the Base sub-model can use either size, the first step is confirming which wheels are actually on the car before choosing among the available tire series, sidewall styles, and product specifications.
255/35R20 is a modern metric radial size in which 255 is the nominal section width in millimeters, 35 is the aspect ratio, R identifies radial construction, and 20 is the wheel diameter in inches. On the 2013 Audi S6, this size supports a low-profile, performance-oriented fitment on a 20-inch rim. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, raised white letter, and redline sidewall treatments. This size is the one to evaluate when the car is running its 20-inch wheel setup and you want to compare appearance and tire-series character within that fitment.
255/40R19 follows the same modern metric radial format, with a 255-millimeter nominal width, a 40-series profile, radial construction, and a 19-inch wheel diameter. For the 2013 Audi S6, this size keeps the same overall diameter as the 20-inch fitment while pairing with a 19-inch rim. Product choices include several BFGoodrich series along with Pro-Trac Street Pro III options in blackwall, raised white letter, and redline styles. This is the correct size to compare when the car is equipped with 19-inch wheels and you want to stay with the intended wheel diameter.
Fitment is straightforward at the sub-model level because the 2013 Audi S6 Base can use both primary tire sizes. The important distinction is not trim level, but whether the car is wearing 19-inch or 20-inch wheels before a tire is selected.
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2013 Audi S6 Base
The 2013 Audi S6 Base can use either of the two radial fitments offered for this model year, depending on the wheel diameter installed on the car. Tire selection starts with confirming the current wheel setup, then comparing the available series, sidewall style, and rim-width specifications within the matching 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 2013 Audi S6 Tires for Sale
Available 2013 Audi S6 tire choices cover both 255/35R20 and 255/40R19 fitments, with BFGoodrich, Nitto, and Pro-Trac offerings. The main comparison points are tire series, blackwall versus RWL or redline appearance, and rim-width specifications within each wheel diameter.
These 2013 Audi S6 tire FAQs focus on the two factory-size fitments, 19-inch versus 20-inch wheel confirmation, radial tire selection, sidewall and brand choices, and the checks worth making before regular road use or after modifications.
Tire Size & Fitment
What tire size fits a 2013 Audi S6?
The 2013 Audi S6 uses two tire sizes: 255/35R20 and 255/40R19. Both are radial fitments, and both apply to the S6 Base depending on which wheel diameter is on the car. The two sizes share the same overall diameter, but one is built for a 20-inch wheel and the other for a 19-inch wheel.
That means the correct choice starts with the wheels currently installed, not just the badge on the car. Checking the sidewall marking on the existing tire and confirming the wheel diameter is the fastest way to avoid ordering the wrong size. Once the wheel size is confirmed, the decision shifts to tire series, sidewall appearance, and the intended balance between restoration style and modern road use.
What size rim does a 2013 Audi S6 use?
A 2013 Audi S6 can use either a 19-inch or 20-inch rim, depending on which of its two tire sizes is on the car. The 255/40R19 tire is used on a 19-inch rim, while the 255/35R20 tire is used on a 20-inch rim. Both are radial combinations for this model year.
Wheel diameter is the first fitment check because the tire size must match it exactly. Several available products in both sizes also call for rim widths in the 8.5- to 10-inch range, so wheel width matters as well when comparing specific tires. If the S6 has aftermarket wheels, verify both diameter and width before choosing a tire, especially on a performance sedan that can be sensitive to wheel-and-tire changes.
Why does the 2013 Audi S6 have more than one tire size?
The 2013 Audi S6 has more than one tire size because it can be equipped with two different wheel diameters. The two primary fitments are 255/40R19 and 255/35R20, both in radial construction. Each size is matched to its own rim diameter, while maintaining the same stated overall diameter in this application.
That setup lets the car use either a 19-inch or 20-inch wheel package without changing the basic tire height. In practical terms, there is no need to guess between them by appearance alone. Confirm the actual wheel diameter on the car, then compare the available tire series, sidewall treatments, and product specifications inside the matching size rather than treating the two fitments as interchangeable.
Choosing the Right Tire
What should I consider when choosing a 255/35R20 tire for a 2013 Audi S6?
Start with the fact that 255/35R20 is a low-profile radial fitment for the 2013 Audi S6 on a 20-inch wheel. In this size, choices include BFGoodrich, Nitto, and Pro-Trac products, with differences in tire series, sidewall style, weight, and some rim-width guidance. Blackwall, raised white letter, and redline appearances are all available.
The right choice depends on how the car is used and how you want it to look. A blackwall tire keeps a more understated modern presentation, while RWL or redline adds a stronger visual statement. It also helps to compare wheel width against the product’s stated range and to consider load figures where shown, especially on a high-performance sedan with substantial curb weight and road-speed capability.
What sidewall styles are available for 2013 Audi S6 tires?
2013 Audi S6 tires are available in blackwall, RWL, and redline sidewall styles within the two primary fitments. Blackwall appears across multiple BFGoodrich and Nitto products, while Pro-Trac Street Pro III adds raised white letter and redline versions in both 255/35R20 and 255/40R19.
Sidewall style does not change the need to match the correct tire size to the wheel diameter, but it does change the overall presentation of the car. Blackwall tends to suit a more understated factory-inspired look, while RWL and redline create a more custom or enthusiast-oriented appearance. Once the wheel size is confirmed, sidewall treatment becomes one of the easiest ways to tailor the S6’s visual character.
What brands offer tires for the 2013 Audi S6?
Tires for the 2013 Audi S6 are available from BFGoodrich, Nitto, and Pro-Trac in the supported 255/35R20 and 255/40R19 sizes. BFGoodrich appears across multiple g-Force series and the g-Force Phenom T/A, Nitto offers the NT555 G2 in 255/35R20, and Pro-Trac offers Street Pro III options in both sizes.
Brand choice should be considered alongside the exact size, wheel diameter, and the type of appearance you want. Some options stay strictly blackwall, while others add RWL or redline styling. Looking at brand alone can miss the details that matter most, so it helps to compare tire series, rim-width compatibility, and any available load information before narrowing the field.
Restoration & Appearance
Which tire should I choose for a period-style 2013 Audi S6?
A period-style tire choice for a 2013 Audi S6 starts with keeping the correct modern radial size for the wheel diameter already on the car, either 255/35R20 or 255/40R19. From there, appearance becomes the main variable. Blackwall gives the car a restrained contemporary look, while RWL and redline options create a stronger custom or enthusiast-flavored presentation.
Because this is a modern performance sedan rather than an earlier classic, period-style usually means preserving the right overall stance and wheel-and-tire relationship rather than chasing a vintage sidewall treatment. The most convincing result usually comes from matching the tire to the car’s existing wheel package and intended visual direction. Size accuracy should stay ahead of appearance when the two are in tension.
How does tire construction affect the appearance of a restored 2013 Audi S6?
On a 2013 Audi S6, tire construction is less about bias-ply versus radial and more about staying with the radial fitment the car uses. The visual effect comes primarily from profile and sidewall treatment within that radial format. A 255/35R20 and a 255/40R19 can deliver a similar overall height, but each is tied to a different wheel diameter and look.
That means appearance is shaped by the full wheel-and-tire package, not construction changes alone. A blackwall keeps the presentation subtle, while RWL or redline adds contrast and makes the tire itself part of the car’s style. For a clean restoration-oriented result, keep the size matched to the installed wheels and use sidewall style as the finishing detail rather than trying to force a mismatched fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 Audi S6?
Yes, modifications can affect tire fitment on a 2013 Audi S6 even when the tire size looks correct on paper. Aftermarket wheels, different offsets, altered wheel widths, lowered suspension, or brake upgrades can all change how a 255/35R20 or 255/40R19 sits in the wheelwell. That matters on a performance sedan with limited sidewall and tighter clearances.
A modified S6 should be checked for inner clearance, fender clearance, and steering movement before assuming either factory-size fitment will behave the same as stock. Wheel diameter still has to match the tire exactly, but width and offset can be just as important. Looking at the current setup before purchase is especially important if the car has been changed from its original wheel package.
What should I inspect before driving a 2013 Audi S6 on new tires?
Before driving a 2013 Audi S6 on new tires, confirm that the tire size matches the wheel diameter, inspect the wheels for damage, and check that inflation pressure is set correctly for the installation. It is also smart to look over suspension and steering components, since uneven wear or looseness can affect how a fresh set of tires performs.
A short initial inspection after installation is worth doing as well. Look for any rubbing at full steering lock, verify that the tires are seated and balanced properly, and monitor air pressure during the first drives. On a high-performance car, worn alignment settings or unnoticed wheel issues can show up quickly, so catching those problems early helps protect the new tires.
How should tires on a 2013 Audi S6 be inspected and maintained?
Tires on a 2013 Audi S6 should be inspected regularly for uneven tread wear, cuts, bulges, cracking, and slow air loss. Because the S6 uses low-profile radial sizes, it also helps to watch for damage from potholes or curb contact, especially around the shoulder and sidewall area. Pressure checks matter just as much as visual inspection.
Routine maintenance is about preserving both safety and ride quality. Keeping inflation consistent, correcting alignment issues promptly, and rotating when appropriate for the tire setup can help prevent premature wear. Cars that are driven less often still need attention, since age and storage conditions affect tires even when tread looks healthy. A careful inspection before longer drives is a smart habit with any performance-oriented sedan.
