The 2020 Audi S7 Sportback blends executive luxury with the sleek fastback profile and twin-turbo performance character that define Audi’s modern S models. It is a car that balances high-speed composure, sharp road manners, and a strong visual presence, so tire selection matters for both stance and driving feel. This S7 uses radial fitments in two sizes, 255/40R20 and 255/35R21, depending on wheel diameter rather than trim level alone. Current product choice centers on a blackwall performance radial in 20-inch fitment. The key step is confirming which wheel package is on the car before comparing tires for appearance, load capability, and everyday road use.
Which Tire Size Is Right for The 2020 Audi S7 Sportback
The 2020 Audi S7 Sportback uses two primary tire sizes, and the first thing to confirm is wheel diameter. Both the Premium Plus and Prestige sub-models can use either 255/40R20 or 255/35R21 radial tires, so selection starts with identifying whether the car is on 20-inch or 21-inch wheels. Once that is settled, the decision becomes choosing the right tire within the correct size and intended use.
255/35R21 is a modern metric radial size in which 255 refers to section width in millimeters, 35 is the aspect ratio, R indicates radial construction, and 21 is the wheel diameter in inches. On the 2020 Audi S7 Sportback, this size suits the 21-inch wheel setup and keeps the fitment in a contemporary low-profile performance format. It carries the sharper, larger-wheel presentation many late-model sport sedans and sportbacks use. Before choosing a tire in this size, confirm that the car still has its 21-inch wheels and that wheel width and overall clearance remain appropriate if the vehicle has been modified.
255/40R20 is a modern metric radial size with a 255-millimeter section width, a 40-series aspect ratio, radial construction, and a 20-inch rim diameter. For the 2020 Audi S7 Sportback, this size applies to the 20-inch wheel package and maintains essentially the same overall diameter as the 21-inch fitment while using a different wheel and sidewall relationship. Available product choice in this size includes BFGoodrich in the g-Force Phenom T/A series with a blackwall sidewall. This size is the right place to focus if the car is equipped with 20-inch wheels and the goal is a performance-oriented modern radial.
Tire fitment for the 2020 Audi S7 Sportback is straightforward because both covered sub-models use the same two size options. The important step is not trim identification by itself, but confirming whether the car has 20-inch or 21-inch wheels before selecting tires.
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2020 Audi S7 Sportback Premium Plus
The 2020 Audi S7 Sportback Premium Plus can use either of the two radial fitments used on this model line, depending on the wheel package on the car. Tire selection starts with confirming 20-inch versus 21-inch wheels, then comparing the available options in the correct size for road use and overall setup.
The 2020 Audi S7 Sportback Prestige follows the same fitment pattern, with both primary radial sizes associated with the sub-model. That means the real decision is wheel-based rather than trim-based, so checking the actual wheel diameter on the vehicle is essential before choosing a tire.
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 2020 Audi S7 Sportback Tires for Sale
Current product coverage for the 2020 Audi S7 Sportback centers on the 255/40R20 size, with a BFGoodrich g-Force Phenom T/A blackwall radial available. This gives 20-inch-wheel cars a modern performance-oriented option to compare by series, load capacity, and rim-width compatibility.
Owners of a 2020 Audi S7 Sportback usually need to confirm wheel diameter first, then sort through tire size, radial fitment, product choice, and road-use checks. These FAQs focus on those exact decisions for this model.
Tire Size & Fitment
What tire size fits a 2020 Audi S7 Sportback?
The 2020 Audi S7 Sportback uses two tire sizes: 255/40R20 and 255/35R21. Both are radial fitments, and both the Premium Plus and Prestige sub-models can use either size depending on which wheel package is installed on the car.
That means trim name alone does not settle the question. The correct starting point is checking the actual wheel diameter on the vehicle, because a 20-inch wheel requires 255/40R20 and a 21-inch wheel requires 255/35R21. If the car has aftermarket wheels, verify the full wheel specification before choosing tires.
What size rim does a 2020 Audi S7 Sportback use?
A 2020 Audi S7 Sportback uses either a 20-inch or 21-inch rim, depending on the tire size on the car. The 255/40R20 fitment uses a 20-inch rim, while the 255/35R21 fitment uses a 21-inch rim.
That distinction matters because the two tire sizes share essentially the same overall diameter but are built around different wheel diameters. Before replacing tires, check the wheel markings or measure the wheel setup already on the car. On a modified vehicle, wheel width and offset should also be reviewed so the replacement tire matches the actual package in use.
Do all 2020 Audi S7 Sportback sub-models use the same tire size?
The Premium Plus and Prestige sub-models share the same fitment pattern rather than having trim-exclusive tire sizes. Each can be fitted with either 255/40R20 or 255/35R21, with the deciding factor being the wheel diameter on the specific car.
That makes sub-model fitment simpler than it first appears, but it still requires a quick visual or physical check of the wheels. A buyer should match the tire to the wheel that is actually installed, not assume the trim badge answers the question. This is especially important when wheels may have been changed after delivery.
Choosing the Right Tire
What should I consider when choosing a 255/40R20 tire for a 2020 Audi S7 Sportback?
Start with the basics: correct size, radial construction, and compatibility with the 20-inch wheel package. In this fitment, the available option includes the BFGoodrich g-Force Phenom T/A blackwall radial, so the decision centers on matching the tire to the car’s wheel setup and intended street use.
It also helps to compare rim-width compatibility, load capacity, and the overall character of the tire series rather than looking at size alone. The BFGoodrich option carries a rim-width range of 8.5 to 10 inches, so the wheel should fall within that span. A modified suspension or wheel package deserves an extra clearance check before installation.
What sidewall styles are available for 2020 Audi S7 Sportback tires?
The currently covered product option for the 2020 Audi S7 Sportback uses a blackwall sidewall. That suits the car’s modern performance character and keeps the appearance clean, understated, and consistent with a contemporary sport-luxury fitment.
Sidewall style on a late-model S7 is usually less about restoration presentation and more about visual preference within the correct size. The main priority remains proper fitment for the installed wheel diameter. Once that is confirmed, sidewall treatment becomes part of the overall look of the car rather than the primary technical decision.
What brands offer tires for the 2020 Audi S7 Sportback?
Current product coverage for this application includes BFGoodrich in the 255/40R20 size. The available tire is part of the g-Force Phenom T/A series and is built as a radial blackwall performance tire for the 20-inch setup.
Brand choice only matters after the size has been matched to the wheel on the car. On this Audi, the bigger dividing line is 20-inch versus 21-inch fitment, since the wrong diameter rules out the tire immediately. Once size is confirmed, compare the brand’s series, load specification, and wheel-width compatibility to the vehicle’s actual setup.
Restoration & Appearance
Does correct tire fitment matter for a 2020 Audi S7 Sportback restoration or preservation build?
Yes. Even on a modern collector-minded car like the 2020 Audi S7 Sportback, correct tire fitment affects stance, wheel-to-tire proportion, and the way the car presents overall. Using the proper 255/40R20 or 255/35R21 size for the installed wheels keeps the appearance aligned with the car’s intended performance-luxury character.
Preservation-minded owners should confirm the wheel package already on the vehicle before replacing tires, especially if ownership history is unclear. A car wearing non-original wheels can still look excellent, but the tire choice should match that setup rather than an assumption about trim. Appearance and fitment work best when size, wheel diameter, and overall presentation stay in balance.
How does tire construction affect the appearance of a preserved 2020 Audi S7 Sportback?
On this car, the primary fitments are radial, so construction does not create a bias-ply versus radial appearance question the way it would on an older collector vehicle. The visual effect comes more from the wheel diameter, sidewall height, and sidewall styling than from a change in construction type.
That makes the 20-inch and 21-inch setups visually distinct even though their overall diameters are very similar. A 21-inch package gives the car a lower-profile presentation, while the 20-inch package uses slightly more sidewall. For an owner focused on preservation, the best appearance usually starts with keeping the tire size matched to the wheel package already on the car.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Audi S7 Sportback?
Yes. A 2020 Audi S7 Sportback may have no fitment issues in standard form, but aftermarket wheels, changes in wheel offset, suspension lowering, or body modifications can alter the space available for a 255/40R20 or 255/35R21 tire. That can change clearance even when the tire size itself sounds correct.
Anyone replacing tires on a modified S7 should confirm wheel diameter first, then review wheel width and how the tire sits at full steering lock and through suspension travel. Clearance around the fenders and inner suspension area matters as much as the sidewall marking. A careful physical check prevents assumptions based only on the model year and trim.
What should I inspect before driving a 2020 Audi S7 Sportback on new tires?
Before driving, inspect the wheels for damage, verify that all four tires match the intended size for the installed rims, and confirm inflation is appropriate for the tires in use. It is also smart to check for valve-stem condition, proper seating on the rim, and any visible interference around the wheel wells.
A short, careful road test is useful after installation. Pay attention to vibration, rubbing, steering pull, or uneven behavior that could point to balance, alignment, or clearance problems. On a high-performance sportback like the S7, even a subtle setup issue can affect drivability, so early inspection is better than assuming everything is fine after mounting.
How often should tires on a 2020 Audi S7 Sportback be inspected?
Tires on a 2020 Audi S7 Sportback should be checked regularly, not just when tread looks low. Frequent inspection helps catch uneven wear, sidewall damage, punctures, and pressure loss early, all of which matter on low-profile performance fitments such as 255/40R20 and 255/35R21.
Monthly visual checks are a sensible habit, with an extra look before longer drives or after encountering potholes or road debris. Owners should watch for cuts, bulges, cracking, and unusual shoulder wear, then correct any pressure or alignment issues promptly. Cars that sit for long periods still need attention, since age and underinflation can create problems even with limited mileage.
