The 2019 Audi A5 Quattro sits in the modern sport-luxury space where crisp styling, everyday refinement, and all-wheel-drive confidence all matter as much as outright pace. In coupe and cabriolet form, it balances contemporary Audi road manners with the sharper stance buyers expect from a premium grand-touring car. Tire fitment centers on two radial sizes, 245/40R18 and 255/35R19, so the first step is confirming which wheel diameter is on the car. From there, the choice shifts toward brand, series, and sidewall presentation, including blackwall, redline, and raised white letter options in 18-inch fitment. That makes wheel verification and intended appearance just as important as size alone.
Which Tire Size Is Right for The 2019 Audi A5 Quattro
The 2019 Audi A5 Quattro uses two primary tire sizes, and the difference comes down to wheel diameter and sub-model configuration. Both are radial fitments, but some versions use 18-inch wheels with 245/40R18 tires while others use 19-inch wheels with 255/35R19 tires. Before choosing a tire, confirm the exact sub-model and the actual wheel diameter on the car, especially if the vehicle has been changed from its original wheel setup.
Fit(s): Premium Cabriolet, Premium Coupe, Premium Plus Cabriolet, Premium Plus Coupe, Prestige Cabriolet, and Prestige Coupe
Construction: Radial|Rim: 18 in
245/40R18 is a modern metric radial size where 245 identifies nominal section width in millimeters, 40 is the aspect ratio, R marks radial construction, and 18 is the wheel diameter in inches. On the 2019 Audi A5 Quattro, this size supports the car's modern low-profile fitment on 18-inch wheels. Available choices include blackwall options from BFGoodrich, Nitto, and M&H Racemaster, along with Pro-Trac Street Pro III versions in redline and raised white letter form. This size is the one to evaluate when the car carries 18-inch wheels and appearance choices matter as much as road use.
Fit(s): Premium Coupe, Premium Plus Cabriolet, Premium Plus Coupe, Prestige Cabriolet, and Prestige Coupe
Construction: Radial|Rim: 19 in
255/35R19 is a modern metric radial size with a 255 millimeter nominal section width, a 35-series profile, radial construction, and a 19-inch rim diameter. For the 2019 Audi A5 Quattro, it is the larger wheel fitment and belongs only on cars equipped with 19-inch wheels. Current choices center on blackwall BFGoodrich offerings across several g-Force series, giving the buyer a narrower but still meaningful range of product character within the correct size. This is the size to compare when the car has 19-inch wheels and the goal is to stay with the proper low-profile radial format.
Tire fitment varies across the 2019 Audi A5 Quattro range, so identifying the exact coupe or cabriolet trim matters before selecting a tire. Some sub-models use only the 18-inch fitment, while others may be equipped with either the 18-inch or 19-inch size depending on configuration.
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2019 Audi A5 Quattro Premium Cabriolet
The 2019 Audi A5 Quattro Premium Cabriolet uses the 245/40R18 radial size. Tire selection here is more about choosing among available 18-inch radial products and sidewall styles than deciding between two primary wheel diameters.
The 2019 Audi A5 Quattro Premium Coupe may use either the 245/40R18 or 255/35R19 radial size. The key step is confirming whether the car has 18-inch or 19-inch wheels before comparing product options or sidewall presentation.
The 2019 Audi A5 Quattro Premium Plus Cabriolet may be fitted with either 245/40R18 or 255/35R19 radials. That means wheel diameter should be checked first, then the tire choice can be narrowed by brand, series, and sidewall style within the correct size.
The 2019 Audi A5 Quattro Premium Plus Coupe may use 245/40R18 or 255/35R19 radial tires. Tire selection starts with verifying the installed wheel diameter, since the two sizes are not interchangeable simply because both belong to the same model year and trim family.
The 2019 Audi A5 Quattro Prestige Cabriolet may use either 245/40R18 or 255/35R19 in radial construction. Once the wheel diameter is confirmed, the buyer can focus on the available tire series and whether a straightforward blackwall or a more distinctive sidewall style is preferred.
The 2019 Audi A5 Quattro Prestige Coupe may be equipped with 245/40R18 or 255/35R19 radial tires. Because both sizes appear within this sub-model family, checking the actual wheel on the car is essential before comparing 18-inch and 19-inch product choices.
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 2019 Audi A5 Quattro Tires for Sale
Available 2019 Audi A5 Quattro tires center on modern radial choices in 245/40R18 and 255/35R19 from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Buyers can compare blackwall options across several performance-oriented series, with redline and raised white letter styling available in the 18-inch fitment.
These FAQs focus on the tire sizes, wheel diameters, radial fitment, product choices, appearance options, and practical checks that matter when selecting tires for a 2019 Audi A5 Quattro.
Tire Size & Fitment
What tire size fits a 2019 Audi A5 Quattro?
The 2019 Audi A5 Quattro uses two primary tire sizes: 245/40R18 and 255/35R19. Both are radial fitments, and the correct size depends on the exact sub-model and, just as importantly, the wheel diameter currently on the car.
Some versions use only the 18-inch fitment, while others may have either 18-inch or 19-inch wheels. Checking the tire sidewall and confirming the wheel diameter before ordering is the safest approach, especially on cars that may have had wheel changes, seasonal wheel sets, or previous owner modifications.
What size rim does a 2019 Audi A5 Quattro use?
A 2019 Audi A5 Quattro uses either an 18-inch or 19-inch rim, depending on the tire size fitted to the car. The 245/40R18 tire belongs on an 18-inch wheel, while the 255/35R19 tire belongs on a 19-inch wheel.
That rim diameter difference is the first thing to verify because a tire for one diameter cannot be mounted on the other. After confirming diameter, it is also worth checking wheel width against the tire's acceptable range and making sure the current wheel setup matches the intended tire size and use.
Do all 2019 Audi A5 Quattro sub-models use the same tire size?
No, 2019 Audi A5 Quattro sub-models do not all use the same tire size. The Premium Cabriolet uses 245/40R18, while several coupe and cabriolet trims may use either 245/40R18 or 255/35R19 depending on wheel setup.
That makes the exact sub-model only part of the answer; the actual wheel on the car still needs to be checked. A quick look at the current sidewall size and wheel diameter will usually settle the fitment question faster than relying on trim name alone, particularly on cars with optional or changed wheels.
Choosing the Right Tire
What should I consider when choosing a 245/40R18 or 255/35R19 tire for a 2019 Audi A5 Quattro?
Start with the correct size and wheel diameter, because the 2019 Audi A5 Quattro uses either 245/40R18 or 255/35R19 depending on configuration. From there, compare tire construction, intended use, rim-width compatibility, load information where given, and the overall character of each tire series.
The 18-inch fitment offers more visible variety, including blackwall, redline, and raised white letter options, while the 19-inch fitment stays more focused on blackwall performance-style choices. Matching the tire to the car's actual wheel setup, appearance goals, and driving use will lead to a better decision than choosing by size alone.
What sidewall styles are available for 2019 Audi A5 Quattro tires?
Sidewall choices for the 2019 Audi A5 Quattro include blackwall across both primary sizes, with redline and RWL availability in 245/40R18. Those extra sidewall treatments appear in Pro-Trac Street Pro III offerings for the 18-inch fitment.
Sidewall style changes the car's visual presentation far more than its fitment basics, so the correct tire size and wheel diameter still come first. Once those are confirmed, the choice becomes whether to keep a modern blackwall look or add a stronger period-inspired accent through redline or raised white letters on 18-inch wheels.
What brands offer tires for the 2019 Audi A5 Quattro?
Tires for the 2019 Audi A5 Quattro are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, depending on size. BFGoodrich appears in both 245/40R18 and 255/35R19, while Nitto, M&H Racemaster, and Pro-Trac are present in the 18-inch fitment.
Brand alone should not decide the purchase. It is more useful to compare which brand offers the right size, whether the tire series matches the intended use, how the sidewall is styled, and whether the wheel width on the car falls within the tire's stated compatibility range.
Restoration & Appearance
Which tire should I choose for a period-style 2019 Audi A5 Quattro?
A period-style approach on a 2019 Audi A5 Quattro still begins with the correct modern radial size for the wheel on the car, either 245/40R18 or 255/35R19. Within those limits, 245/40R18 offers the most distinctive appearance choices, including redline and raised white letter versions alongside standard blackwall tires.
That makes the 18-inch fitment the more appearance-driven option when the goal is to give the car a more customized visual attitude. Buyers focused on a cleaner contemporary look may stay with blackwall, while anyone seeking a stronger style statement should first confirm that the car is actually equipped with 18-inch wheels.
How does tire construction affect the appearance of a restored 2019 Audi A5 Quattro?
On a 2019 Audi A5 Quattro, construction itself is straightforward because the primary fitments are radial tires. The visual difference comes less from bias-ply versus radial choice and more from profile, wheel diameter, and sidewall treatment within the correct modern radial size.
An 18-inch setup with redline or raised white letters gives a very different impression from a blackwall 19-inch tire, even though both remain radial fitments. For an appearance-focused project, matching the tire to the wheel diameter and the car's intended style direction is more relevant than chasing an older construction type.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Audi A5 Quattro?
Yes, modifications can affect tire fitment on a 2019 Audi A5 Quattro even when the tire size looks close to stock. Aftermarket wheels, altered wheel width or offset, suspension changes, and body modifications can all change how a 245/40R18 or 255/35R19 tire sits and clears the car.
A changed setup should be checked for wheel diameter, width, and clearance at full steering lock and through suspension travel. Even on an otherwise standard car, verifying the actual wheel and tire combination already installed is important before replacing tires, because previous owners may have moved away from the original configuration.
What should I inspect before driving a 2019 Audi A5 Quattro on new tires?
Before driving a 2019 Audi A5 Quattro on new tires, check that the installed size matches the wheel diameter, confirm proper inflation, and make sure there is no visible interference at the fenders or during steering movement. It is also smart to inspect wheels for damage and verify that lug hardware is correctly seated.
A short initial drive followed by a recheck can help catch rubbing, vibration, or air loss early. On a car with low-profile tires such as 245/40R18 or 255/35R19, paying attention to wheel condition and sidewall clearance matters because even small fitment issues tend to show up quickly on the road.
How often should tires on a 2019 Audi A5 Quattro be inspected?
Tires on a 2019 Audi A5 Quattro should be inspected regularly, not just when tread looks worn. Routine checks should include pressure, uneven wear, cuts, punctures, sidewall damage, and any signs of impact from potholes or road debris, especially with the car's low-profile radial sizes.
A visual check every month and a closer inspection before longer trips is a sensible habit. Cars that sit for extended periods also deserve attention for flat spotting, air loss, or age-related cracking, while vehicles driven often should be watched for wear patterns that may point to alignment or suspension issues.
