The 2020 Audi A5 Sportback blends coupe-like styling with four-door practicality, making it one of the more versatile luxury sportbacks of its era. Buyers are often drawn to its balance of sharp road manners, everyday comfort, and clean European proportions. Tire fitment centers on two modern radial sizes, 245/40R18 and 255/35R19, with the exact choice tied to trim and wheel package. That opens up meaningful differences in series, sidewall presentation, and intended use, from blackwall performance radials to specialty options like redline, raised white letter, and drag-oriented construction. The right selection starts with confirming trim level and wheel diameter, then matching the tire to the car's appearance and driving priorities.
Which Tire Size Is Right for The 2020 Audi A5 Sportback
The 2020 Audi A5 Sportback uses two primary tire sizes, and the first step is confirming both the exact sub-model and the wheel diameter on the car. Fitment is radial in both cases, but 245/40R18 uses an 18-inch rim while 255/35R19 uses a 19-inch rim, so the real decision is not just size but which wheel package the car actually has and what type of tire best suits that setup.
245/40R18 is a modern metric radial size in which 245 represents nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2020 Audi A5 Sportback, this size supports an 18-inch wheel setup and appears across multiple trims. Available choices include blackwall performance radials from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, along with redline and raised white letter versions in the Street Pro III series. This size is the right place to start when the car carries 18-inch wheels and you want to compare performance-focused or appearance-driven options within that package.
255/35R19 is a modern metric radial size with a 255-millimeter nominal section width, a 35-series aspect ratio, radial construction, and a 19-inch rim diameter. On the 2020 Audi A5 Sportback, it serves the 19-inch wheel fitment used on certain trim and wheel combinations rather than every version of the model. Product selection in this size centers on BFGoodrich g-Force series blackwall radials, including all-season and sport-oriented choices. This is the size to evaluate when the car already wears 19-inch wheels and the goal is staying with the proper rim diameter while comparing available series within that fitment.
Sub-model fitment matters on the 2020 Audi A5 Sportback because tire choice is not completely uniform across the range. The Premium stays with one primary size, while Premium Plus and Prestige may use either the 18-inch or 19-inch fitment, so confirming the exact trim and wheel setup is important before selecting tires.
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2020 Audi A5 Sportback Premium
The 2020 Audi A5 Sportback Premium uses the 245/40R18 radial size, making its fitment more straightforward than the upper trims. Tire selection then comes down to comparing performance-oriented blackwall options or appearance-driven choices such as redline or raised white letter within the correct 18-inch format.
The 2020 Audi A5 Sportback Premium Plus can use either 245/40R18 or 255/35R19 depending on the wheel package on the car. That makes wheel confirmation the key first step, after which the choice shifts to the available radial series and sidewall styles in the matching rim diameter.
The 2020 Audi A5 Sportback Prestige also spans both primary fitments, with either 245/40R18 or 255/35R19 radial tires depending on the wheel setup. Tire selection should begin with the installed wheel diameter, then move to comparing the available product series and sidewall presentation that suit the car's intended use.
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 A5 Sportback Tires for Sale
Available 2020 Audi A5 Sportback tire choices span 245/40R18 and 255/35R19 radial fitments, with products from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Buyers can compare blackwall performance tires, specialty drag radial construction, and appearance-focused redline or raised white letter options depending on size.
These FAQs focus on the exact tire sizes used on the 2020 Audi A5 Sportback, how fitment changes by sub-model and wheel diameter, and how to compare available radial options by series, sidewall style, and intended use.
Tire Size & Fitment
What tire size fits a 2020 Audi A5 Sportback?
The 2020 Audi A5 Sportback uses either 245/40R18 or 255/35R19, depending on the trim and wheel package. Both are radial tire sizes, but they are not interchangeable primary fitments because they use different rim diameters: 18 inches for 245/40R18 and 19 inches for 255/35R19.
The practical first step is checking the actual wheels on the car, especially on Premium Plus and Prestige models that may use either size. Once wheel diameter is confirmed, the choice becomes which tire series, sidewall style, and performance character best match the car's use rather than guessing between two sizes.
What size rim does a 2020 Audi A5 Sportback use?
A 2020 Audi A5 Sportback uses either an 18-inch or 19-inch rim, depending on the tire size installed. The 245/40R18 fitment uses an 18-inch rim, while the 255/35R19 fitment uses a 19-inch rim.
Rim diameter should be confirmed before anything else because it determines which tire size family applies to the car. Wheel width also matters when comparing products, since some 18-inch and 19-inch tires carry different approved rim-width ranges, and aftermarket wheels can change what needs to be checked for proper compatibility.
Do all 2020 Audi A5 Sportback sub-models use the same tire size?
No. The 2020 Audi A5 Sportback Premium uses 245/40R18, while Premium Plus and Prestige can use either 245/40R18 or 255/35R19. That means fitment varies within the model range rather than staying identical across every covered sub-model.
This matters because a buyer cannot assume that a tire fitting one A5 Sportback trim automatically belongs on another. Checking the exact sub-model helps, but the final confirmation still comes from the wheel diameter already on the car, particularly if the car has had wheel changes since new.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 Audi A5 Sportback?
Start with the correct primary size for the car: 245/40R18 or 255/35R19. From there, compare construction, intended use, approved rim-width range where stated, load figures when shown, and whether the tire's character is more street-performance oriented, appearance-oriented, or specialized for drag race use.
A5 Sportback buyers often have two separate priorities: preserving the car's road manners and choosing a look that suits the vehicle. An 18-inch setup offers the broadest visual variety here, including blackwall, redline, and raised white letter choices, while the 19-inch fitment stays more centered on blackwall performance radial options.
What sidewall styles are available for 2020 Audi A5 Sportback tires?
Sidewall style depends on size. In 245/40R18, available styles include blackwall, redline, and RWL, which can be described as raised white letter. In 255/35R19, the available options shown here are blackwall radials.
That gives the 18-inch fitment more flexibility for buyers who want to lean into a custom or more expressive appearance, while the 19-inch fitment stays closer to a modern performance presentation. Sidewall choice does not change the need to keep the correct size and rim diameter for the wheel already on the car.
What brands offer tires for the 2020 Audi A5 Sportback?
Available brands for the 2020 Audi A5 Sportback include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand choice varies by size, with the 245/40R18 fitment offering the widest spread and the 255/35R19 fitment centered on BFGoodrich g-Force series tires.
Brand is only one part of the decision. It helps more to compare the tire series within the correct size, along with sidewall treatment, intended use, and wheel compatibility. That approach keeps the choice grounded in how the car is actually driven instead of treating every tire in the same size as interchangeable.
Restoration & Appearance
Which tire should I choose for a period-style 2020 Audi A5 Sportback?
A period-style approach on a 2020 Audi A5 Sportback still starts with the correct modern radial size for the car's wheel package. Within that, 245/40R18 gives the most appearance flexibility because it includes blackwall, redline, and raised white letter options, while 255/35R19 remains focused on blackwall performance radials.
The right choice depends on whether the goal is a clean contemporary look or a more individualized presentation. Appearance should stay secondary to fitment, so verify the exact wheel diameter first and keep the tire within the proper size before using sidewall style to shape the car's visual character.
How does tire construction affect the appearance of a restored 2020 Audi A5 Sportback?
Construction is less of an appearance dividing line here because the 2020 Audi A5 Sportback uses radial tires in both primary fitments. Visual character comes more from sidewall treatment and tire series than from choosing between bias-ply and radial, since no bias-ply primary fitment applies to this model.
That means a restoration-oriented or collector-minded buyer should focus on keeping the proper size and wheel diameter, then decide whether blackwall, redline, or raised white letter best suits the car. On this vehicle, construction choice is mostly settled already; the visible differences come from how the sidewall is presented.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Audi A5 Sportback?
Yes. Wheel changes, suspension lowering, altered offsets, and body modifications can all affect tire fitment on a 2020 Audi A5 Sportback even when the tire size appears close to stock. This matters most because the model already uses two different primary wheel diameters, so changes to the car can narrow clearance further.
A modified A5 Sportback should be checked for wheel diameter, wheel width, and clearance at the fender and steering points before a tire is chosen. Even within the correct 18-inch or 19-inch family, product dimensions and approved rim-width ranges can influence how comfortably a tire works on the car.
What should I inspect before driving a 2020 Audi A5 Sportback on new tires?
Before road use, inspect air pressure, wheel condition, valve stems, lug hardware, and the tire sidewalls for any shipping or installation damage. It also helps to verify that all four tires match the intended size for the car's wheel package and that there is no rubbing at full steering lock.
A careful first inspection is especially useful on a car with optional wheel packages or previous modifications. After a short initial drive, recheck pressure and look for any contact marks, uneven seating, or vibration. Those early checks can catch wheel or clearance issues before they become more serious.
How often should tires on a 2020 Audi A5 Sportback be inspected?
Tires on a 2020 Audi A5 Sportback should be inspected regularly, not just when they look visibly worn. Check them for tread condition, cuts, bulges, punctures, and uneven wear, and keep an eye on pressure because low-pressure operation can affect both tire life and how the car feels on the road.
Inspection matters even more on a vehicle that is driven occasionally or stored for stretches at a time. A car that sits can still develop age-related issues, so look closely at the sidewalls and note any persistent air loss. That routine helps preserve both fitment confidence and everyday road manners.
