The 2004 Audi A8 Quattro arrived as a full-size luxury sedan that paired aluminum-intensive engineering with all-wheel-drive confidence and a distinctly modern German touring character. Buyers looking at one today are usually balancing original appearance, wheel package, and real road use rather than chasing a single vintage-style tire solution. This Audi uses radial tire fitments in 235/55R17, 255/45R18, and 255/40R19, so the first step is confirming which wheel diameter is actually on the car. From there, the choice shifts to blackwall, redline, raised white letter, goldline, or whitewall presentation across several tire series. That makes wheel verification just as important as tread style or brand preference.
Which Tire Size Is Right for The 2004 Audi A8 Quattro
The 2004 Audi A8 Quattro uses three primary tire sizes, and the difference comes down to wheel diameter rather than a change from bias-ply to radial construction. All three fitments are radial, but you need to confirm whether the car is wearing 17-inch, 18-inch, or 19-inch wheels before comparing tire options. Once that is settled, the decision becomes a matter of sidewall style, tire series, and the kind of road-going character you want from the finished setup.
235/55R17 is a metric radial size that uses a 235-millimeter section width, a 55-series profile, and a 17-inch wheel. On the 2004 Audi A8 Quattro, it represents a modern radial fitment with a little more sidewall than the 18-inch and 19-inch alternatives, which can matter to buyers comparing ride character and wheel presentation. Available choices include BFGoodrich, American Classic, and Coker Classic offerings with blackwall, goldline, redline, and wide whitewall styles across g-Force, Asymmetrical Tread, and Star Series lines. It is the right size to evaluate only after confirming that the car is equipped with 17-inch rims.
255/40R19 is a metric radial size with a 255-millimeter section width, a 40-series profile, and a 19-inch rim diameter. For the 2004 Audi A8 Quattro, this is one of the lower-profile wheel-and-tire combinations, so selection tends to center on the wheel package already on the car and the look you want at the sidewall. Product choices include BFGoodrich and Pro-Trac options in blackwall, redline, and raised white letter form across g-Force and Street Pro III series. This size should be considered only when the Audi is already set up with 19-inch wheels and suitable rim width.
255/45R18 is a metric radial size that combines a 255-millimeter section width with a 45-series profile on an 18-inch wheel. On the 2004 Audi A8 Quattro, it sits between the 17-inch and 19-inch fitments, making it a practical middle ground for buyers comparing available wheel diameters rather than changing tire construction. BFGoodrich, Nitto, and Pro-Trac options appear in this size with blackwall, redline, and raised white letter sidewalls across g-Force, NT555 G2, and Street Pro III series. It is the correct path only after confirming the car's 18-inch wheel setup and matching rim-width requirements.
Sub-model fitment is straightforward here because the covered 2004 Audi A8 Quattro variant shares the same three tire-size paths. The main task is not choosing between trims, but verifying which wheel diameter is actually on the car before selecting a tire.
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2004 Audi A8 Quattro L 4.2
The 2004 Audi A8 Quattro L 4.2 uses radial tire fitments tied to 17-inch, 18-inch, or 19-inch wheel packages. That means tire selection starts with wheel confirmation, then moves to sidewall appearance, tire series, brand, and other product differences within the correct 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 2004 Audi A8 Quattro Tires for Sale
Available 2004 Audi A8 Quattro tire choices span 17-inch, 18-inch, and 19-inch radial fitments from BFGoodrich, American Classic, Coker Classic, Nitto, and Pro-Trac. The main points of comparison are tire series, blackwall or specialty sidewall treatments, and rim-width compatibility within each correct size.
These 2004 Audi A8 Quattro tire FAQs focus on the three correct sizes, wheel-diameter confirmation, radial fitment, sidewall and brand choices, and the maintenance checks that matter before putting a large luxury sedan back on the road.
Tire Size & Fitment
What tire size fits a 2004 Audi A8 Quattro?
The 2004 Audi A8 Quattro uses three primary radial tire sizes: 235/55R17, 255/45R18, and 255/40R19. Those sizes correspond to different wheel diameters, so there is not one universal fitment for every car wearing the A8 Quattro badge in this model year and sub-model grouping.
The practical first step is checking the wheels currently on the car and matching the tire to that diameter. A sedan wearing 17-inch wheels needs the 17-inch fitment, while 18-inch and 19-inch wheels require their own matching sizes. If the car has been modified, verify wheel width and clearance before choosing among available tire styles and brands.
What size rim does a 2004 Audi A8 Quattro use?
The 2004 Audi A8 Quattro appears with 17-inch, 18-inch, and 19-inch rim diameters, depending on which tire size is on the car. The matching sizes are 235/55R17 for 17-inch rims, 255/45R18 for 18-inch rims, and 255/40R19 for 19-inch rims.
That rim diameter is the most important fitment checkpoint before comparing actual tires. Even when two sizes have similar overall dimensions, the tire still has to match the wheel diameter exactly. It is also worth confirming wheel width, especially on 18-inch and 19-inch setups, because available products carry their own approved rim-width ranges.
Why does the 2004 Audi A8 Quattro have more than one tire size?
More than one tire size applies because the 2004 Audi A8 Quattro was fitted with different wheel diameters. All three options are radial constructions, but each size is tied to a specific wheel package: 17-inch, 18-inch, or 19-inch.
That means the correct tire is determined by the wheels on the individual car, not by choosing whichever size looks closest on paper. A8 sedans that have changed hands over the years may also have aftermarket wheels, so checking the sidewall size already mounted, the wheel diameter, and the actual wheel width helps avoid an expensive mismatch.
Choosing the Right Tire
What should I consider when choosing a tire for a 2004 Audi A8 Quattro?
Start with the correct size for the wheel diameter on the car: 235/55R17, 255/45R18, or 255/40R19. From there, compare construction details within the radial options, along with sidewall style, brand, tire series, and any load or rim-width specifications that matter to your exact wheel setup.
A buyer focused on a cleaner modern look may stay with blackwall, while someone aiming for a custom or distinctive presentation may lean toward redline, goldline, raised white letter, or wide whitewall offerings where available. The smartest comparison is between tires in the same correct size, not between different wheel-diameter fitments.
What sidewall styles are available for 2004 Audi A8 Quattro tires?
Sidewall choices for the 2004 Audi A8 Quattro include blackwall, redline, raised white letter, goldline, and wide whitewall, depending on the tire size. Not every style appears in every fitment, so the available look depends on whether the car uses the 17-inch, 18-inch, or 19-inch wheel setup.
That variety gives the A8 owner room to shape the car's presentation without changing the basic fitment path. A blackwall tire keeps the appearance more understated, while redline, raised white letter, goldline, or whitewall styles create a more custom or nostalgic look. Always choose the sidewall treatment only after confirming the correct size and wheel diameter.
What brands offer tires for the 2004 Audi A8 Quattro?
Available brands for the 2004 Audi A8 Quattro include BFGoodrich, American Classic, Coker Classic, Nitto, and Pro-Trac. Brand availability depends on size, with some names appearing only in certain wheel-diameter fitments rather than across all three primary tire sizes.
The better way to use brand as a shopping filter is after narrowing the search to the correct size on the car. Once that fitment is confirmed, compare each brand's available tire series, sidewall treatments, and wheel-width compatibility. That approach keeps the decision focused on what actually suits the Audi's wheel package and intended appearance.
Restoration & Appearance
Which tire should I choose for a period-style 2004 Audi A8 Quattro?
A period-style 2004 Audi A8 Quattro tire choice starts with the wheel diameter already on the car, since the fitments are 235/55R17, 255/45R18, and 255/40R19. After that, the most suitable tire depends on whether the goal is a restrained factory-era look or a more customized presentation using specialty sidewalls.
Blackwall tires usually preserve the sedan's original early-2000s luxury-sport character more naturally, while redline, goldline, or whitewall treatments move the appearance in a more personalized direction. When originality matters closely, compare the finished look against period photos, marque references, or other model-specific history before settling on a sidewall style.
Which sidewall style suits a period-style 2004 Audi A8 Quattro?
For a period-style 2004 Audi A8 Quattro, blackwall is generally the most restrained visual choice because it fits the car's modern luxury-sedan character. Redline, raised white letter, goldline, and wide whitewall options are available in certain sizes, but they create a more custom appearance than a subtle contemporary presentation.
The right choice depends on whether the Audi is being kept close to its original road-going personality or styled for a more individual look. Sidewall treatment should also be considered alongside wheel diameter, since the available specialty styles vary by size. Matching the look to the car's overall finish often matters as much as the tread or brand.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 Audi A8 Quattro?
Yes. Modifications can change tire fitment on a 2004 Audi A8 Quattro even when the tire size appears close to one of the standard options. Aftermarket wheels, altered wheel width, suspension changes, or body and fender work can all affect clearance, steering sweep, and how comfortably a given tire sits on the rim.
A car that has been lowered or fitted with non-original wheels deserves a closer check before ordering replacement tires. Confirm the actual wheel diameter first, then review width and clearance at full steering lock and through suspension travel. That is especially important on the 18-inch and 19-inch combinations, where wheel-package differences matter more than trim naming.
What should I inspect before driving a 2004 Audi A8 Quattro on new tires?
Before driving a 2004 Audi A8 Quattro on new tires, inspect wheel condition, verify the tire size matches the wheel diameter, and make sure inflation is set appropriately for the tire and vehicle use. It is also wise to check for any rubbing points, damaged suspension parts, or alignment issues that could affect early tire wear.
A large all-wheel-drive luxury sedan places real demands on tires, so a quick visual check is not enough. Look at tread seating, valve stems, lug security, and clearance at the inner fender and suspension areas. A short initial drive followed by a second inspection can catch contact marks, vibration, or pressure loss before regular road use begins.
How often should tires on a 2004 Audi A8 Quattro be inspected?
Tires on a 2004 Audi A8 Quattro should be inspected regularly, especially if the car is driven infrequently or stored for long periods. Pressure, tread condition, uneven wear, sidewall cracking, cuts, bulges, and slow air loss are all worth checking before routine use and again before longer trips.
Collector-minded or lightly used cars often age their tires out before they wear them out, so appearance alone is not a complete guide. Monthly pressure checks and a more careful visual inspection several times during the year help catch issues early. Any sign of vibration, pull, or rubbing should also trigger a wheel, alignment, and suspension review.
