2020 Audi A5 Quattro Tires

The 2020 Audi A5 Quattro uses two primary tire sizes: 245/40R18 and 255/35R19. Both are radial fitments, but they do not apply the same way across the range. Premium Coupe and Premium Cabriolet models use 245/40R18, while Premium Plus and Prestige Coupe and Cabriolet versions may use either 245/40R18 or 255/35R19 depending on wheel setup.

The practical takeaway is to verify more than just the model name on the trunk. The exact trim and the actual wheel diameter on the car determine which size belongs on it. A5s that have had wheel changes, package changes, or previous tire substitutions should be checked carefully before choosing between the 18-inch and 19-inch fitments.

A 2020 Audi A5 Quattro uses either an 18-inch or 19-inch rim, depending on the sub-model and wheel package. The 245/40R18 fitment uses an 18-inch rim, while the 255/35R19 fitment uses a 19-inch rim. Both sizes are part of the model's radial tire setup, but the rim diameter must match the tire exactly.

Rim diameter is the first thing to confirm before comparing tire options. An 18-inch tire cannot be mounted on a 19-inch wheel, and the reverse is just as true. It is also smart to confirm wheel width and make sure the car still has the wheel setup intended for that trim, especially if aftermarket wheels have been installed.

No. The 2020 Audi A5 Quattro does not use one tire size across every sub-model. Premium Coupe and Premium Cabriolet models use 245/40R18, while Premium Plus and Prestige Coupe and Cabriolet versions can use either 245/40R18 or 255/35R19. That means fitment depends on both trim level and the wheel package on the individual car.

That variation matters because tire shopping for an A5 Quattro is not just a year-make-model exercise. The correct next step is to confirm whether the car is a Premium, Premium Plus, or Prestige model and then verify whether it wears 18-inch or 19-inch wheels. That keeps the selection focused on the right tire family instead of guessing by appearance alone.

Start with the correct size, radial construction, and 18-inch wheel fitment. From there, 245/40R18 choices for the 2020 Audi A5 Quattro vary by brand, tire series, sidewall style, rim-width specification, load specification, and intended use. In this size, the range includes performance-oriented blackwall options as well as redline and raised white letter choices.

The best comparison points depend on how the car is used and how it should look. A daily-driven coupe or cabriolet may call for one type of road tire, while a styling-focused build may lean toward a more distinctive sidewall presentation. It also helps to confirm wheel width before narrowing the options inside the 245/40R18 category.

Sidewall style depends on size. In 245/40R18, available choices include blackwall, redline, and RWL, which is raised white letter. In 255/35R19, the available products are blackwall. That means the 18-inch fitment offers more visual variety, while the 19-inch fitment stays focused on a cleaner, more modern blackwall presentation.

Appearance can change the character of the car even when the size remains correct. Buyers who want a contemporary, understated look may stay with blackwall, while someone building a more custom presentation may want the redline or raised white letter option available in 245/40R18. Wheel diameter has to be settled first, since the sidewall choices follow the size.

Tires for the 2020 Audi A5 Quattro are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand availability depends on the tire size. The 245/40R18 fitment has the broadest spread of brands, while 255/35R19 is represented here by BFGoodrich across several g-Force series.

Brand choice should be considered alongside size, wheel diameter, series, and sidewall style rather than as a stand-alone decision. Some buyers will be focused on a blackwall performance tire, while others may want the visual distinction offered by Pro-Trac's redline or raised white letter 18-inch options. Narrow the fitment first, then compare the brand and series mix within that size.

A period-style choice for a 2020 Audi A5 Quattro starts with the correct modern radial size for the specific trim and wheel diameter. Because this is a late-model Audi rather than a vintage restoration car, the visual decision is less about historic tire construction and more about whether the car should keep a clean blackwall look or take on a more custom presentation.

The 245/40R18 fitment offers the most appearance flexibility, including blackwall, redline, and raised white letter options. Buyers aiming for a more factory-inspired presentation will usually gravitate toward blackwall, while custom styling can justify a bolder sidewall. Wheel size still controls the decision, so appearance choices should be made only within the correct 18-inch or 19-inch fitment.

On a 2020 Audi A5 Quattro, tire construction does not create a bias-ply-versus-radial appearance decision because the primary fitments are radial. The visual difference comes more from sidewall treatment, overall tire profile within the correct size, and the wheel package already on the car. In practice, 18-inch and 19-inch setups give the car a noticeably different stance and presentation.

For an owner refreshing or preserving the car's appearance, the key is to keep the tire matched to the intended wheel diameter and trim character. A blackwall tire maintains a more restrained modern look, while redline or raised white letter styling in 245/40R18 creates a more customized effect. Those choices influence presentation without changing the underlying radial construction.

Yes. Modifications can affect tire fitment on a 2020 Audi A5 Quattro even when the tire size itself looks close to the original setup. Aftermarket wheels, different wheel widths, offset changes, lowered suspension, or body alterations can all change how a 245/40R18 or 255/35R19 tire sits in the wheel opening and how much clearance remains under steering and suspension movement.

That makes it important to inspect the car as it actually sits today, not just as it left the factory. Measure the wheel diameter, confirm wheel width, and look at clearance around the fenders, inner liners, and suspension. A modified A5 Quattro may still use one of the standard sizes, but the surrounding setup has to support that tire safely.

Before driving a 2020 Audi A5 Quattro on new tires, confirm that the size matches the wheel diameter and that the tires are mounted on suitable-width rims. Check inflation pressure, inspect valve stems, and look for any signs of rubbing at full steering lock or over suspension travel. It is also worth verifying torque on the wheels after installation.

A quick road-use inspection helps catch setup issues early. Listen for contact noises, watch for steering pull or vibration, and recheck pressure after the first drives. On a car with staggered-looking wheel packages, previous repairs, or aftermarket changes, that extra check matters because even a correct-size tire can behave differently if the wheel or suspension setup has changed.

Tires on a 2020 Audi A5 Quattro should be inspected regularly rather than only when tread looks worn. Look over them at least monthly and before longer drives for pressure loss, uneven wear, sidewall cuts, bulges, or impact damage. Because this model may use either 18-inch or 19-inch fitments, the inspection should also confirm that all four tires still match the intended setup.

Routine inspection becomes even more important if the car sees seasonal use, rough roads, or long periods parked. Low-profile modern radial tires can hide problems until they begin affecting ride or handling, so checking condition early helps avoid surprise issues. It is also smart to inspect after pothole strikes or wheel changes that could alter alignment or clearance.