2015 Audi A5 Quattro Tires

The 2015 Audi A5 Quattro uses two primary tire sizes: 245/40R18 and 255/35R19. Both are radial fitments, but they do not apply across every configuration in the same way, because the car may be equipped with either 18-inch or 19-inch wheels depending on sub-model and wheel package.

The practical first step is confirming the exact sub-model and the actual wheel diameter on the car. Premium coupe and cabriolet versions use 245/40R18, while Premium Plus and Prestige versions may use either size. If the car has changed hands or has aftermarket wheels, checking the tire sidewall and wheel diameter directly helps prevent ordering the wrong fitment.

A 2015 Audi A5 Quattro uses either an 18-inch or 19-inch rim, depending on the tire size fitted to the car. The 245/40R18 size mounts on an 18-inch wheel, while the 255/35R19 size mounts on a 19-inch wheel.

Rim diameter is the non-negotiable part of the fitment decision, since an 18-inch tire cannot be mounted on a 19-inch wheel and vice versa. It is also worth checking wheel width when comparing products, because individual tires in these sizes can carry different approved rim-width ranges. A quick wheel and tire inspection is especially helpful on cars that may have seen wheel-package changes over time.

No, not every 2015 Audi A5 Quattro sub-model uses the same tire size. Premium Cabriolet and Premium Coupe models use 245/40R18, while Premium Plus and Prestige coupe and cabriolet versions may be fitted with either 245/40R18 or 255/35R19.

That means trim level alone is helpful, but the wheel on the car still deserves confirmation before choosing tires. On Premium Plus and Prestige models, the tire decision starts with identifying whether the car is running the 18-inch or 19-inch setup. Looking at the existing sidewall marking is often the fastest way to verify the correct size before comparing available products.

Choosing a 245/40R18 tire for a 2015 Audi A5 Quattro starts with confirming that the car is on 18-inch wheels, then comparing the type of tire offered in that size. Available options range from blackwall performance-oriented radials to specialty selections such as redline and raised white letter versions.

Beyond size, compare construction details that affect compatibility and intended use, including approved rim width, load capacity where stated, and the tire series itself. A buyer looking for a clean modern appearance may stay with blackwall choices, while someone wanting a more customized presentation may prefer the Pro-Trac sidewall treatments. Matching the tire to how the car is actually driven matters as much as matching the size.

Sidewall style depends on the tire size selected for the 2015 Audi A5 Quattro. Blackwall tires are available in both 245/40R18 and 255/35R19, while the 245/40R18 size also includes redline and RWL, or raised white letter, options through the Pro-Trac Street Pro III line.

That makes the 18-inch fitment the better choice for buyers who want more visual variety without moving away from a modern radial size. The 19-inch fitment stays more focused on blackwall performance-style presentation. Sidewall treatment should be chosen after confirming the correct tire size, since appearance options do not override the wheel-diameter requirement or the fitment differences between sub-models.

Tires for the 2015 Audi A5 Quattro are available from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Brand coverage varies by size, with BFGoodrich appearing in both primary fitments, while Nitto, M&H Racemaster, and Pro-Trac are represented in the 245/40R18 size.

The more useful comparison is not brand name alone, but which brand offers the size, sidewall style, and tire series that match the car’s setup and intended use. Some choices lean toward mainstream blackwall street performance, while others introduce more specialized character or appearance. Once wheel diameter is confirmed, comparing brand offerings within the correct size becomes much more straightforward.

A period-style 2015 Audi A5 Quattro still needs to begin with the correct modern radial size for the car’s wheel setup, either 245/40R18 or 255/35R19. Since this is a contemporary Audi rather than a mid-century collector car, the appearance decision is less about vintage construction and more about selecting a tire that suits the car’s original-era look.

For a restrained presentation, blackwall tires are the natural fit in either size. Buyers working with the 18-inch fitment have more visual flexibility, including redline and raised white letter options, though those create a more customized look than a subtle factory-era appearance. When exact originality matters, wheel finish, wheel diameter, and overall stance are just as important as the tire itself.

Tire construction is straightforward on the 2015 Audi A5 Quattro because both primary fitments are radial. That means the appearance difference comes less from bias-ply versus radial construction and more from profile, wheel diameter, and sidewall style within the proper radial size.

A blackwall 245/40R18 or 255/35R19 keeps the look closest to the understated performance-touring character associated with this generation of A5. On 18-inch cars, redline or raised white letter sidewalls can change the visual tone noticeably, giving the car a more personalized presentation. The important thing is to preserve proper size and wheel compatibility while deciding how subtle or expressive the finished look should be.

Yes, modifications can affect tire fitment on a 2015 Audi A5 Quattro even when the tire size itself appears close to stock. Aftermarket wheels, changes in wheel width, suspension lowering, altered offset, or body modifications can all influence how a 245/40R18 or 255/35R19 tire sits in the wheel opening.

The smart approach is to verify the actual wheel diameter and width already on the car, then check clearance at the fender, steering, and suspension points before settling on a tire. This matters most on cars that no longer wear their original wheel package. A tire that matches the sidewall size marking still needs to work with the wheel and chassis setup in real use.

Before driving a 2015 Audi A5 Quattro on new tires, inspect the wheel size, confirm the tire size matches the car’s setup, and check inflation pressure carefully. It is also worth looking over the wheels for damage and making sure the tires seat properly and clear the suspension, brake components, and bodywork.

A short initial road test helps reveal vibration, rubbing, or steering issues before regular use. Rechecking pressure after the first drives is a sensible habit, especially on a low-profile fitment like this. If the car has recently had wheel changes, alignment work, or suspension modifications, paying attention to steering feel and tire clearance can prevent premature wear and avoid fitment surprises.

Tires on a 2015 Audi A5 Quattro should be inspected regularly, not just when tread appears worn. Monthly pressure checks are a good baseline, and the tires should also be looked over for cuts, bulges, uneven wear, embedded debris, and sidewall damage, especially because low-profile performance sizes can be more sensitive to road impacts.

Cars that are driven infrequently still need attention, since age and storage conditions can affect tire condition long before tread is gone. It helps to inspect before longer trips and after any hard pothole impact. Keeping the correct inflation pressure and catching alignment or wear issues early is one of the simplest ways to protect both ride quality and the tires themselves.