The 2015 Audi A6 sits in the modern luxury sport-sedan space, blending understated executive styling with the sharper road manners buyers expect from a contemporary German four-door. For tire selection, that matters because this A6 uses radial fitments in three distinct sizes tied to wheel choice: 245/45R18, 255/40R19, and 255/35R20. That means the first step is confirming the exact wheel setup rather than choosing between vintage-style constructions. Available options also vary by brand, tire series, and sidewall treatment, including blackwall, redline, and raised white letter choices on some sizes. The right pick comes down to matching the car's actual rim diameter with the appearance and driving character you want.
Which Tire Size Is Right for The 2015 Audi A6
The 2015 Audi A6 uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel package. All three are radial metric sizes, but they are tied to different rim diameters: 18, 19, or 20 inches. Before choosing a tire, confirm whether the car has its standard wheel setup or a 19-inch or 20-inch option, because rim diameter is the key fitment decision here.
A 245/45R18 tire is a metric radial size with a 245-millimeter section width, a 45-series profile, and fitment for an 18-inch rim. On the 2015 Audi A6, this size serves buyers using the 18-inch wheel setup and keeps the tire decision centered on modern radial construction rather than a bias-ply-versus-radial choice. Available products in this size include BFGoodrich and Nitto offerings, with blackwall sidewalls and tire series such as g-Force Comp 2 AS, g-Force Sport Comp 2, Nitto NT555 G2, and g-Force Phenom T/A. This size is the right place to start when the car retains its 18-inch wheels and you want to compare product character within the correct fitment.
Fit(s): Premium (19 Inch Option) and Premium Plus (19 Inch Option)
Construction: Radial|Rim: 19 in
A 255/40R19 tire uses a 255-millimeter section width, a 40-series aspect ratio, and a radial construction built for a 19-inch rim. On the 2015 Audi A6, this size applies to 19-inch-option configurations, so it should be chosen only after the wheel diameter is confirmed. Product choices broaden here, with BFGoodrich and Pro-Trac options spanning blackwall, redline, and raised white letter sidewall treatments, plus series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Street Pro III. It is a useful fitment for buyers who want the 19-inch setup and a little more appearance variety within the proper size.
A 255/35R20 tire keeps the 255-millimeter section width but lowers the profile to a 35-series sidewall and fits a 20-inch rim. For the 2015 Audi A6, this size belongs to the 20-inch-option setup, making wheel confirmation essential before moving into product selection. BFGoodrich, Nitto, and Pro-Trac options are available in this size, with blackwall, redline, and raised white letter sidewall treatments and series including g-Force Comp 2 AS, g-Force Sport Comp 2, Nitto NT555 G2, g-Force Phenom T/A, and Street Pro III. This is the size to evaluate when the car already wears 20-inch wheels and appearance and tire-series choice matter as much as fitment.
Sub-model fitment on the 2015 Audi A6 is tied closely to wheel-package choice rather than a single tire size across the board. Checking the exact Premium or Premium Plus configuration, along with whether the car has the 19-inch or 20-inch option, keeps tire selection on the right rim diameter from the start.
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2015 Audi A6 Premium
The 2015 Audi A6 Premium uses the standard 18-inch tire fitment rather than one of the larger optional wheel packages. That keeps the decision focused on selecting the right radial tire within the proper size, brand, and series for the car's existing wheel setup.
The 2015 Audi A6 Premium (19 Inch Option) moves to the 19-inch fitment, so tire selection must follow that wheel diameter rather than the standard Premium setup. This version gives added room to compare sidewall treatments and tire series once the 19-inch wheels are confirmed.
The 2015 Audi A6 Premium Plus uses the standard 18-inch radial tire setup unless it carries one of the larger wheel options. That makes the main job confirming whether the car remains on its standard wheels before comparing the available product choices in the correct size.
The 2015 Audi A6 Premium Plus (19 Inch Option) uses the 19-inch fitment rather than the standard Premium Plus size. Tire selection here should stay centered on the existing wheel package, then move to brand, sidewall style, and tire-series differences within that 19-inch size.
The 2015 Audi A6 Premium Plus (20 Inch Option) uses the 20-inch radial fitment, making it the largest wheel-package choice in this group. Tire shopping for this version should begin with verifying the 20-inch rims, then comparing available blackwall, redline, or raised white letter options in the proper size.
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 2015 Audi A6 Tires for Sale
Available 2015 Audi A6 tire choices span 18-, 19-, and 20-inch radial sizes from BFGoodrich, Nitto, and Pro-Trac. Depending on size, buyers can compare blackwall, redline, and raised white letter sidewalls across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, NT555 G2, and Street Pro III.
2015 Audi A6 tire questions usually come down to identifying the correct wheel-package size first, then comparing radial tire choices by brand, sidewall style, and series. The questions below focus on fitment, product selection, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2015 Audi A6?
The 2015 Audi A6 uses three primary tire sizes: 245/45R18, 255/40R19, and 255/35R20. All are radial metric sizes, and the correct one depends on the exact sub-model and wheel option rather than a single universal fitment for every A6 covered here.
The most important step is confirming the car's actual rim diameter before ordering tires. A Premium or Premium Plus with standard wheels uses a different size than a 19-inch or 20-inch option, so the tire should match the wheels on the car now, especially if the vehicle has ever been re-equipped with a different factory or aftermarket wheel package.
What size rim does a 2015 Audi A6 use?
A 2015 Audi A6 in this fitment range may use an 18-inch, 19-inch, or 20-inch rim, depending on the sub-model and wheel package. The 245/45R18 size pairs with an 18-inch rim, 255/40R19 with a 19-inch rim, and 255/35R20 with a 20-inch rim.
Rim diameter should be verified before anything else because none of these tire sizes cross over onto a different wheel diameter. It is also wise to check wheel width at the same time, especially on cars that may have changed wheels over the years, since product compatibility can vary within the same nominal tire size.
Why does the 2015 Audi A6 have more than one tire size?
The 2015 Audi A6 has more than one tire size because different sub-models and wheel-package options use different rim diameters. Standard configurations use 245/45R18, while 19-inch-option models use 255/40R19 and the 20-inch-option Premium Plus uses 255/35R20.
That means tire selection starts with identifying how the car is equipped, not by comparing tread patterns first. A quick check of the current sidewall size or wheel diameter usually settles the question, and that is especially helpful on used cars where optional wheels or later wheel swaps can make the original trim name less reliable than the wheel actually on the vehicle.
Choosing the Right Tire
What should I consider when choosing a tire for a 2015 Audi A6?
Start with the correct size for the car's wheel package: 245/45R18, 255/40R19, or 255/35R20. From there, compare radial tire construction, brand, tire series, sidewall treatment, and useful product details such as rim-width compatibility, load figures where shown, and overall product character.
A buyer focused on a cleaner modern presentation may stay with blackwall, while someone looking for a more custom visual touch may prefer redline or raised white letter options available in some sizes. It also helps to match the tire to how the A6 is actually used, whether that means everyday driving, seasonal fair-weather use, or a more appearance-driven wheel-and-tire setup.
What sidewall styles are available for 2015 Audi A6 tires?
Sidewall style depends on size. Blackwall is available across all three primary 2015 Audi A6 sizes, while redline and raised white letter options appear in the 255/40R19 and 255/35R20 fitments through Pro-Trac Street Pro III products.
That makes sidewall style part of the tire decision only after the correct size is confirmed. Buyers staying with the standard 18-inch fitment will be comparing blackwall tires, while 19-inch and 20-inch option cars open the door to a more distinctive visual treatment without stepping outside the proper wheel diameter for those sub-model configurations.
What brands offer tires for the 2015 Audi A6?
Tires for the 2015 Audi A6 are available from BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich appears across all three fitments, Nitto is available in 18-inch and 20-inch applications, and Pro-Trac options appear in the 19-inch and 20-inch sizes.
Brand should be compared alongside the actual product series and sidewall treatment rather than by name alone. One A6 owner may want a straightforward blackwall radial in a familiar performance-oriented series, while another may be selecting a 19-inch or 20-inch tire partly for its redline or raised white letter appearance.
Restoration & Appearance
Which tire should I choose for a period-style 2015 Audi A6?
A period-style 2015 Audi A6 tire choice starts with the wheel package the car actually uses. Since this is a modern radial-fitment sedan, staying with the correct 245/45R18, 255/40R19, or 255/35R20 size preserves the intended overall visual balance much more effectively than forcing a different diameter.
Appearance then comes down to how subtle or expressive the finished look should be. Blackwall keeps the presentation closest to a clean contemporary luxury-sedan look, while some 19-inch and 20-inch options introduce redline or raised white letter styling for a more customized impression that may suit an owner-built visual theme.
How does tire construction affect the appearance of a restored 2015 Audi A6?
On a 2015 Audi A6, tire construction is not a bias-ply-versus-radial restoration issue because the covered fitments are radial. The appearance difference comes more from profile and sidewall styling within the correct size than from construction changes between old and modern tire types.
That makes size discipline especially important on a restoration-minded or carefully preserved A6. Keeping the proper 18-, 19-, or 20-inch fitment for the car's wheel package helps maintain the intended stance, while sidewall treatment lets the owner decide between a restrained blackwall look or a more noticeable custom-style accent on certain larger-wheel sizes.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 Audi A6?
Yes. Wheel changes, suspension alterations, lowering, spacer use, or body modifications can all affect tire fitment on a 2015 Audi A6 even when the tire size appears close to a factory-style option. The car's covered sizes are tied to specific wheel diameters, so changes in wheel width or offset can matter quickly.
A modified A6 should be checked for inner clearance, fender clearance, and steering clearance before a new set is chosen. It is smart to confirm the actual wheel size stamped on the wheel and compare it with the tire's compatible rim-width range, especially on cars that may have moved from standard 18-inch wheels to 19-inch or 20-inch aftermarket setups.
What should I inspect before driving a 2015 Audi A6 on new tires?
Before driving a 2015 Audi A6 on new tires, inspect wheel condition, confirm the tire size matches the installed rim diameter, and check that each tire is properly seated and inflated. It also helps to look over the suspension and alignment condition so the new tires are not immediately compromised by an existing chassis issue.
After installation, watch for any signs of rubbing at full steering lock or over suspension movement, particularly if the car has optional or aftermarket wheels. Rechecking pressure after the first few drives is worthwhile, and any vibration, pull, or unusual noise should be addressed early before it turns into uneven wear or an ongoing fitment problem.
How often should tires on a 2015 Audi A6 be inspected?
Tires on a 2015 Audi A6 should be inspected regularly, not just when tread looks low. Pressure, tread wear pattern, cuts, punctures, sidewall damage, and any developing bulges deserve routine attention, especially on a car that may alternate between daily use and longer periods of light use.
A quick visual check before longer drives is a sensible habit, and a more thorough inspection should include the inner sidewalls and shoulder wear that can be easy to miss. Cars with 19-inch or 20-inch wheel packages benefit from extra attention to curb damage and impact-related issues, since lower-profile tires can make wheel and tire condition more critical.
