The 2021 Audi A7 Sportback blends fastback luxury styling with modern grand-touring capability, making tire choice an important part of preserving the car’s balance of ride quality, response, and visual stance. On this exact model, fitment centers on two radial sizes: 255/40R20 and 255/35R21, with the correct choice depending on the sub-model and wheel setup. That means the main decision is not vintage-style construction, but confirming whether the car is on 20-inch or 21-inch rims and then selecting the right tire within that size. For owners focused on daily road use, replacement planning should start with exact wheel diameter, sub-model fitment, and any changes from the original wheel package.
Which Tire Size Is Right for The 2021 Audi A7 Sportback
The 2021 Audi A7 Sportback uses two primary tire sizes, and the first thing to confirm is the exact sub-model and wheel diameter. Most versions use 255/40R20 on a 20-inch rim, while certain Prestige applications can also use 255/35R21 on a 21-inch rim. Since both are radial fitments, the real choice starts with matching the car’s actual wheel setup before comparing tire specifications.
Fit(s): Premium, Premium Plus, Premium Plus PHEV, Prestige, and Prestige PHEV
Construction: Radial|Rim: 20 in
A 255/40R20 tire uses a 255-millimeter nominal section width, a 40-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2021 Audi A7 Sportback, this is the more widely used fitment across the covered sub-model range and it suits the car’s modern performance-luxury character. Available replacement choice in this size includes BFGoodrich with a Blackwall sidewall in the g-Force Phenom T/A series. This size is the right place to start when the car is equipped with 20-inch wheels and the goal is to preserve proper fitment without changing rim diameter.
A 255/35R21 tire keeps the same 255-millimeter nominal width but uses a lower 35-series profile on a 21-inch rim. On the 2021 Audi A7 Sportback, this size applies to certain Prestige fitments, so it should not be assumed across the full model line. Its role is tied directly to the 21-inch wheel package rather than to a general A7 Sportback replacement search. This is the size to evaluate when the car already wears 21-inch wheels and the priority is maintaining the intended wheel-and-tire relationship for that specific setup.
Sub-model fitment is mostly straightforward, but it is not identical across the full 2021 Audi A7 Sportback range. Most covered trims use 255/40R20, while Prestige fitment requires closer attention because both 20-inch and 21-inch tire sizes appear within that sub-model.
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2021 Audi A7 Sportback Premium
The 2021 Audi A7 Sportback Premium uses the 255/40R20 radial tire size. Tire selection for this sub-model starts with confirming the existing 20-inch wheel setup and then comparing replacement choices within that size rather than looking at alternate Prestige fitments.
The 2021 Audi A7 Sportback Premium Plus uses the 255/40R20 radial tire size. That keeps the buying decision focused on choosing the right 20-inch replacement tire and verifying that the car has not been changed to a different wheel package.
The 2021 Audi A7 Sportback Premium Plus PHEV uses the 255/40R20 radial tire size. For this sub-model, the key step is staying with the correct 20-inch fitment unless the car has been modified, then comparing available tire characteristics within that size.
The 2021 Audi A7 Sportback Prestige can use either 255/40R20 or 255/35R21 radial tires, depending on the wheel package on the car. That makes wheel diameter confirmation essential before selecting a replacement, since the two sizes are tied to different rim diameters.
The 2021 Audi A7 Sportback Prestige PHEV uses the 255/40R20 radial tire size. Tire choice here centers on proper 20-inch replacement fitment and checking that the vehicle still carries its intended wheel setup before comparing products.
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 2021 Audi A7 Sportback Tires for Sale
Available 2021 Audi A7 Sportback tire selection is currently centered on 255/40R20, with a BFGoodrich Blackwall option in the g-Force Phenom T/A series. Comparison points in the product grid include tire series, sidewall style, radial construction, rim-width compatibility, and load specification.
For the 2021 Audi A7 Sportback, the most important questions usually center on the correct tire size by sub-model, 20-inch versus 21-inch wheel fitment, product selection within the right radial size, and the checks to make before road use.
Tire Size & Fitment
What tire size fits a 2021 Audi A7 Sportback?
The 2021 Audi A7 Sportback uses two primary tire sizes: 255/40R20 and 255/35R21. Most covered sub-models use 255/40R20, while certain Prestige applications can use either 255/40R20 or 255/35R21 depending on the wheel package.
The practical next step is to confirm the exact sub-model and the actual wheel diameter on the car before choosing a replacement tire. A7 Sportback owners should not assume that every Prestige model uses the same rim size, and any wheel change from stock makes that verification even more important.
What size rim does a 2021 Audi A7 Sportback use?
A 2021 Audi A7 Sportback uses either a 20-inch or 21-inch rim, depending on the tire size fitted to the vehicle. The 255/40R20 size belongs on a 20-inch rim, while the 255/35R21 size belongs on a 21-inch rim.
Rim diameter is the first fitment point to verify because the two tire sizes are tied to different wheel packages. Checking the wheel itself, the current tire sidewall, and the exact trim helps prevent ordering the correct width and profile in the wrong rim diameter.
Do all 2021 Audi A7 Sportback sub-models use the same tire size?
No, not every 2021 Audi A7 Sportback sub-model uses the same tire size. Premium, Premium Plus, Premium Plus PHEV, and Prestige PHEV use 255/40R20, while Prestige fitment can involve either 255/40R20 or 255/35R21.
That difference matters because the tire choice follows the wheel package, not just the model name on the decklid. Prestige owners should check the actual wheel diameter on the car before selecting tires, especially if the vehicle has changed hands or has ever been fitted with aftermarket wheels.
Choosing the Right Tire
What should I consider when choosing a 255/40R20 tire for a 2021 Audi A7 Sportback?
Start with the correct size, radial construction, and wheel compatibility. For the 2021 Audi A7 Sportback, 255/40R20 belongs with a 20-inch rim, and available product details in this size include factors such as tire series, Blackwall styling, rim-width range, load specification, and overall tire weight.
The right comparison depends on how the car is used. A daily-driven A7 Sportback may call for close attention to load and wheel-width compatibility, while a second-car or seasonal vehicle may place more emphasis on maintaining the intended look and keeping the existing wheel-and-tire package consistent.
What sidewall styles are available for 2021 Audi A7 Sportback tires?
Current product coverage for the 2021 Audi A7 Sportback includes a Blackwall sidewall style in 255/40R20. On a modern Audi like the A7 Sportback, Blackwall presentation keeps the appearance understated and consistent with contemporary performance-luxury tire styling.
Sidewall style matters mostly as an appearance choice once the correct size and rim diameter are confirmed. It should be considered alongside the tire series, load specification, and wheel-width compatibility so the replacement not only looks right on the car but also suits the wheel package already in place.
What brands offer tires for the 2021 Audi A7 Sportback?
Current product selection for the 2021 Audi A7 Sportback includes BFGoodrich in the 255/40R20 size. The available BFGoodrich option is part of the g-Force Phenom T/A series and uses radial construction with a Blackwall sidewall.
Brand is only one part of the decision. The more important step is confirming that the tire matches the car’s actual wheel diameter and intended size, then comparing the series characteristics, rim-width range, and load specification to make sure the replacement suits the specific A7 Sportback setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 Audi A7 Sportback?
Yes, modifications can affect tire fitment on a 2021 Audi A7 Sportback. Aftermarket wheels, suspension lowering, spacer use, or changes in wheel width can all alter how a 255/40R20 or 255/35R21 tire sits in the wheel opening and how much clearance remains during steering and suspension movement.
Any modified A7 Sportback should be checked carefully before a replacement tire is chosen. Wheel diameter, wheel width, and available clearance at the fender and suspension become more important once the car no longer follows its original wheel package, even when the tire size itself looks familiar.
What should I inspect before driving a 2021 Audi A7 Sportback on new tires?
Inspect the tire size, wheel diameter, inflation pressure, and overall installation condition before driving. It is also smart to check for any signs of bead seating issues, sidewall damage, uneven wheel-to-tire matching, or visible clearance concerns at the fender, suspension, and steering components.
A short, careful road test helps confirm that the car tracks properly and that no rubbing or vibration is present. On a 2021 Audi A7 Sportback, that check is especially useful when replacing tires on a Prestige model, where 20-inch and 21-inch wheel setups can both appear.
How often should tires on a 2021 Audi A7 Sportback be inspected?
Tires on a 2021 Audi A7 Sportback should be inspected regularly for pressure loss, irregular wear, cuts, bulges, and tread condition. A quick visual check before routine driving and a more thorough inspection at service intervals helps catch problems early, especially on lower-profile fitments.
Inspection matters even more when the car is driven infrequently or stored for stretches at a time. Heat, underinflation, and curb damage can shorten tire life, so keeping an eye on sidewall condition and wear patterns helps protect both ride quality and fitment integrity.
