The 2016 Audi S8 sits at the intersection of full-size luxury and understated high performance, delivering the presence of Audi’s flagship sedan with a sharper, more aggressive character. Buyers looking at this exact model usually care as much about preserving that balance as they do about outright grip or appearance. Tire fitment centers on two 21-inch radial sizes, 265/35R21 and 275/35R21, with the exact choice tied to sub-model and summer-tire configuration. That makes this page less about broad sizing guesswork and more about confirming the correct setup, understanding what each size means, and matching the tire to the car’s intended road use.
Which Tire Size Is Right for The 2016 Audi S8
The 2016 Audi S8 uses two primary tire sizes, and both are radial designs for 21-inch wheels. The first step is identifying the exact sub-model or whether the car is on the summer-tire configuration, because that determines whether 265/35R21 or 275/35R21 applies. Once that is confirmed, the decision shifts to choosing a tire that matches the car’s wheel setup, performance intent, and overall road-use priorities.
275/35R21 is a metric radial size in which 275 refers to nominal section width in millimeters, 35 is the aspect ratio, R indicates radial construction, and 21 is the wheel diameter in inches. On the 2016 Audi S8, this size is tied to the summer-tire configurations, making it part of a more specific fitment path rather than a universal S8 size. Its dimensions place it slightly larger than 265/35R21 in both section width and overall diameter. That makes exact sub-model confirmation important before selecting a replacement tire for appearance, clearance, and handling consistency.
265/35R21 is a metric radial size with a nominal 265-millimeter section width, a 35-series profile, radial construction, and a 21-inch rim diameter. On the 2016 Audi S8, this size applies to the Base and S8 Plus configurations outside the summer-tire setup. It remains a low-profile performance-oriented fitment, so matching the exact size matters for maintaining the intended wheel-to-tire relationship. This is the size to evaluate when the car is not equipped with the summer-tire specification and still uses its correct 21-inch wheel diameter.
Tire fitment varies across the 2016 Audi S8 range, even though every covered configuration uses a 21-inch radial tire. Checking the exact sub-model matters here because Base and S8 Plus models differ from the summer-tire versions in primary tire size.
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2016 Audi S8 (Summer Tires)
The 2016 Audi S8 with the summer-tire configuration uses 275/35R21 radial tires. That makes this version a fitment-specific choice, so replacement selection should start with confirming that the car still has the correct 21-inch wheel setup and summer-tire configuration.
The 2016 Audi S8 Base uses 265/35R21 radial tires on a 21-inch wheel. For this sub-model, the key step is staying with the proper size and then comparing tire choices that suit the car’s intended mix of performance driving, everyday road use, and wheel compatibility.
The 2016 Audi S8 Plus uses 265/35R21 radial tires unless it is the separate summer-tire configuration. That means buyers should confirm the exact Plus setup before choosing a tire, especially on cars that may have seen wheel, tire, or seasonal setup changes over time.
The 2016 Audi S8 Plus with the summer-tire configuration uses 275/35R21 radial tires. This setup should be matched carefully to the car’s actual wheel and tire package so the replacement choice stays aligned with the vehicle’s intended high-performance fitment.
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.
Frequently Asked Questions
Owners of a 2016 Audi S8 usually need to sort out the right 21-inch tire size first, then confirm how that choice relates to sub-model, summer-tire fitment, wheel setup, and ongoing road-use maintenance.
Tire Size & Fitment
What tire size fits a 2016 Audi S8?
The 2016 Audi S8 uses two primary tire sizes: 265/35R21 and 275/35R21. Both are radial tires for 21-inch wheels, but they do not apply to every S8 configuration the same way. Base and S8 Plus models use 265/35R21, while the summer-tire versions use 275/35R21.
The most important next step is confirming the exact sub-model and current wheel setup on the car. A previous owner may have changed wheels or installed a different seasonal package, so matching the replacement tire to the actual configuration is more important than assuming every 2016 S8 uses the same size.
What size rim does a 2016 Audi S8 use?
The covered tire fitments for the 2016 Audi S8 use a 21-inch rim diameter. Both 265/35R21 and 275/35R21 are built for 21-inch wheels, so wheel diameter stays consistent even though tire width and overall dimensions vary between the two primary sizes.
That consistency makes wheel-diameter verification simpler, but it does not eliminate the need to check the exact tire size already on the car. A 21-inch wheel can still be paired with more than one correct S8 tire size, and replacement selection should also take wheel width and vehicle clearance into account.
Do all 2016 Audi S8 sub-models use the same tire size?
No. The 2016 Audi S8 range uses more than one primary tire size depending on sub-model and whether the car has the summer-tire configuration. Base and S8 Plus models use 265/35R21, while the S8 Summer Tires and S8 Plus Summer Tires configurations use 275/35R21.
That difference matters because the two sizes are not just alternate spellings of the same fitment. Before choosing a replacement tire, confirm the exact trim and inspect the current wheel-and-tire combination on the car so the selected size matches the intended setup rather than a generalized S8 listing.
Choosing the Right Tire
What should I consider when choosing a 265/35R21 or 275/35R21 tire for a 2016 Audi S8?
Start with the exact fitment your 2016 Audi S8 uses, because 265/35R21 and 275/35R21 apply to different configurations. Both sizes are radial 21-inch tires, but they differ in section width and overall dimensions, so the correct choice begins with matching the tire to the car’s actual sub-model or summer-tire setup.
Once the correct size is confirmed, compare the tire against the wheel setup and how the car is driven. A low-profile performance sedan like the S8 benefits from careful attention to wheel width, seasonal use, ride expectations, and clearance around suspension and body components, especially if anything has been changed from stock.
How do I choose between the available 21-inch tires for a 2016 Audi S8?
The right comparison starts with size, not just wheel diameter. A 2016 Audi S8 may use either 265/35R21 or 275/35R21, so the first filter is selecting the tire that matches the car’s exact configuration. From there, the most useful comparison points are the tire’s intended use, profile match, and compatibility with the existing wheels.
It also helps to think about how the car will be used most often. A vehicle driven primarily on fair-weather roads may have different priorities than one seeing broader street use, but either way the chosen tire should match the S8’s low-profile fitment and be checked for proper clearance at full steering and suspension movement.
What rim-fitment details should I compare when choosing 2016 Audi S8 tires?
The 2016 Audi S8 uses 21-inch tires, so rim diameter is the first requirement. After that, the practical comparison shifts to whether the wheel setup on the car matches the intended tire size, since 265/35R21 and 275/35R21 are different fitments even though they share the same wheel diameter.
Wheel width and the overall wheel package still matter, especially on a performance sedan with low-profile tires. A car that has aftermarket wheels, spacers, or suspension changes may need extra attention before replacement tires are selected, since size alone does not confirm that the full wheel-and-tire package remains appropriate.
Restoration & Appearance
Does correct tire fitment matter for a 2016 Audi S8 restoration or preservation project?
Yes. Even though the 2016 Audi S8 is newer than a traditional collector car, correct tire fitment still matters on a preservation-minded car. The right 21-inch size helps maintain the intended stance and visual balance, and the difference between 265/35R21 and 275/35R21 is tied to the car’s exact configuration.
Owners trying to keep the car close to its original presentation should confirm the current setup before replacing anything. Matching the proper size to the correct sub-model or summer-tire specification helps avoid a look that feels slightly off, especially on a sedan where wheel-to-tire proportion is a visible part of the design.
How does tire size affect the appearance of a 2016 Audi S8?
Tire size has a noticeable effect on the way a 2016 Audi S8 sits and fills its wheel openings. Both 265/35R21 and 275/35R21 are low-profile 21-inch radial sizes, but they differ in section width and overall diameter, which can subtly change the car’s visual stance and sidewall proportion.
That is why appearance-minded owners should avoid choosing only by wheel diameter. Confirming the exact fitment keeps the car closer to the look intended for its specific configuration, while mixing sizes without a clear reason can alter the visual balance that helps define the S8’s combination of luxury presence and performance character.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2016 Audi S8?
Yes. Modifications can change how well a tire size works on a 2016 Audi S8, even when the wheel diameter remains 21 inches. Lowering changes, aftermarket wheels, altered offsets, and spacer use can all affect how 265/35R21 or 275/35R21 tires sit in relation to the fenders, suspension, and steering components.
That is especially important on a low-profile performance fitment where clearances are tighter than on a taller sidewall tire. Any S8 that has been modified should be checked carefully at full steering lock and through suspension movement before settling on a replacement size, even if the tire code looks familiar.
What should I inspect before driving a 2016 Audi S8 on new tires?
Before road use, inspect tire pressure, tread condition, bead seating, and overall sidewall condition, and confirm that the new tires match the correct 2016 Audi S8 size. It also helps to check for uneven wear patterns, because they can point to alignment or suspension issues that may carry over into the new set.
A short inspection drive should include listening for rubbing and making sure the steering feels normal from center to full lock. On a car like the S8, where 21-inch low-profile tires are part of the overall driving character, it is wise to verify that wheels are properly secured and clearances stay consistent under load.
How often should tires on a 2016 Audi S8 be inspected?
Tires on a 2016 Audi S8 should be inspected regularly, not just when tread looks low. A quick visual check every month and a closer inspection before longer drives is a practical routine, especially on a high-performance luxury sedan where low-profile 21-inch tires can show damage or irregular wear more quickly.
Age and storage matter as much as mileage on lower-use vehicles. Cars that sit for extended periods should be checked for cracking, flat spotting, air loss, and any signs of sidewall distress, since a tire can appear to have usable tread while still needing attention before the car returns to regular road use.
