The 2008 Audi A8 Quattro sits in the era when flagship European sedans blended all-weather luxury, high-speed composure, and increasingly assertive wheel and tire packages. On this car, tire selection is tied closely to wheel diameter, because the A8 Quattro uses three primary radial sizes: 255/45R18, 255/40R19, and 275/35R20. That keeps the decision centered on confirming the exact wheel setup first, then choosing among blackwall, raised white letter, or redline presentations across several performance-oriented tire series. For owners balancing road use with appearance, the right choice comes down to correct size, wheel compatibility, and the overall look desired on the car.
Which Tire Size Is Right for The 2008 Audi A8 Quattro
The 2008 Audi A8 Quattro uses three primary tire sizes, and the first step is confirming which wheel diameter is on the car. These sizes are shared across the covered sub-models, but they correspond to different 18-inch, 19-inch, and 20-inch wheel setups. Once the wheel size is confirmed, the decision shifts to tire series, sidewall style, and the kind of road-use character you want from a modern radial.
255/40R19 is a modern metric radial size in which 255 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 19 is the wheel diameter in inches. On the 2008 Audi A8 Quattro, this size supports a lower-profile look than the 18-inch fitment while staying close in overall diameter. Available choices include BFGoodrich and Pro-Trac products, with blackwall, raised white letter, and redline sidewall treatments across g-Force and Street Pro III series. It is a useful fitment to evaluate when the car already carries 19-inch wheels and the goal is to preserve that wheel-and-tire proportion.
255/45R18 is a modern metric radial size that uses a 255-millimeter nominal section width, a 45-series profile, and an 18-inch rim diameter. For the 2008 Audi A8 Quattro, it delivers one of the primary factory-style size formats while maintaining an overall diameter very close to the 19-inch alternative. Tire choices in this size include BFGoodrich, Nitto, and Pro-Trac, with blackwall, raised white letter, and redline options depending on the series. This size deserves attention when the car is equipped with 18-inch wheels and the owner wants to compare appearance-oriented and performance-oriented radial options within that setup.
275/35R20 is a modern metric radial size with a wider 275-millimeter nominal section width, a 35-series profile, and a 20-inch rim diameter. On the 2008 Audi A8 Quattro, this size stands apart from the 18-inch and 19-inch options because it pairs a larger wheel diameter with a shorter sidewall and slightly larger overall tire diameter. BFGoodrich, Nitto, and Pro-Trac options are available here, including blackwall, raised white letter, and redline presentations across several tire series. It is the size to consider only after confirming the car is running 20-inch wheels and has the wheel width and clearance to match that package.
Tire fitment is straightforward across the covered 2008 Audi A8 Quattro sub-models because each one uses the same three primary radial sizes. What matters most is confirming the actual wheel diameter on the car, since 18-inch, 19-inch, and 20-inch setups are all in play.
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2008 Audi A8 Quattro Base
The 2008 Audi A8 Quattro Base shares the same three primary radial tire sizes used across the broader model range. Tire selection is therefore less about trim-specific fitment and more about matching the car's actual 18-inch, 19-inch, or 20-inch wheel setup before comparing sidewall style and tire series.
The 2008 Audi A8 Quattro L 4.2 also uses the same three radial tire sizes as the other covered sub-models. That makes wheel confirmation the key first step, followed by choosing the tire series and sidewall presentation that best suits how the longer-wheelbase sedan is driven and presented.
The 2008 Audi A8 Quattro L W12 follows the same tire-size pattern, with 18-inch, 19-inch, and 20-inch radial fitments all applicable depending on wheel setup. Selection should begin with the wheel diameter already on the car, then move to product differences such as blackwall versus redline or raised white letter styling.
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 2008 Audi A8 Quattro Tires for Sale
Available 2008 Audi A8 Quattro tires center on 255/45R18, 255/40R19, and 275/35R20 radials from BFGoodrich, Nitto, and Pro-Trac. The main comparison points are tire series, blackwall versus RWL or redline sidewalls, and wheel-width compatibility within each size.
Owners researching 2008 Audi A8 Quattro tires usually need to sort out wheel diameter first, then compare the right radial size, sidewall style, and tire series. These FAQs focus on exact fitment, product choice, appearance, and practical road-use checks.
Tire Size & Fitment
What tire size fits a 2008 Audi A8 Quattro?
The 2008 Audi A8 Quattro uses three primary radial tire sizes: 255/45R18, 255/40R19, and 275/35R20. Those sizes correspond to three different wheel diameters, so the correct fitment depends on whether the car is equipped with 18-inch, 19-inch, or 20-inch wheels.
The most important next step is to verify the actual wheels on the car rather than choosing by model name alone. Many A8 Quattro cars remain on their original wheel diameter, but some may have been changed over time, and that affects which of the three sizes should be considered.
What size rim does a 2008 Audi A8 Quattro use?
The 2008 Audi A8 Quattro uses 18-inch, 19-inch, or 20-inch rims, depending on which tire size is on the car. The matching primary sizes are 255/45R18 for 18-inch rims, 255/40R19 for 19-inch rims, and 275/35R20 for 20-inch rims.
Rim diameter should be confirmed before anything else because the tire must match the wheel exactly. It also helps to verify wheel width when comparing products, since some tire options in these sizes include stated rim-width ranges that should align with the actual wheel on the vehicle.
Do all 2008 Audi A8 Quattro sub-models use the same tire size?
The covered 2008 Audi A8 Quattro sub-models share the same three primary radial tire sizes: 255/45R18, 255/40R19, and 275/35R20. That applies to the Base, L 4.2, and L W12 versions, so the fitment pattern is consistent across those sub-models.
Even with that shared fitment pattern, the correct choice still depends on the wheels actually installed on the car. A buyer should confirm whether the vehicle is wearing 18-inch, 19-inch, or 20-inch wheels, then compare tire series, sidewall style, and product specifications within that exact size.
Choosing the Right Tire
What should I consider when choosing a 2008 Audi A8 Quattro tire?
Start with the correct primary size for the wheel on the car: 255/45R18, 255/40R19, or 275/35R20. After that, compare radial construction details that matter to ownership, including tire series, sidewall style, rim-width compatibility, and load figures where they are stated.
A8 Quattro owners often balance appearance with road use, so the best comparison is not just brand name but how the tire fits the intended setup. A blackwall performance radial creates a different presentation than redline or raised white letter styling, and wheel width should always be checked before making a final selection.
What sidewall styles are available for 2008 Audi A8 Quattro tires?
Available sidewall styles for 2008 Audi A8 Quattro tires include Blackwall, RWL, and Redline, depending on the tire size and series chosen. Blackwall appears across BFGoodrich and Nitto offerings, while Pro-Trac Street Pro III adds raised white letter and redline alternatives in the covered sizes.
That sidewall choice affects the car's overall presentation more than its basic fitment, as long as the tire size is correct. A clean blackwall keeps a more understated modern look, while RWL or redline gives the sedan a stronger custom or enthusiast-oriented visual character without changing the required wheel diameter.
What brands offer tires for the 2008 Audi A8 Quattro?
BFGoodrich, Nitto, and Pro-Trac all offer tires in sizes used on the 2008 Audi A8 Quattro. Depending on the exact fitment, choices include BFGoodrich g-Force series products, Nitto NT555 G2, and Pro-Trac Street Pro III options in several sidewall treatments.
Brand alone should not be the only deciding factor. It makes more sense to compare the exact tire size, the series character, the sidewall presentation, and whether the product's rim-width range matches the wheels on the car, especially when moving between the 18-inch, 19-inch, and 20-inch fitments.
Restoration & Appearance
Which tire should I choose for a period-style 2008 Audi A8 Quattro?
A period-style 2008 Audi A8 Quattro tire choice starts with keeping the correct wheel diameter and primary radial size already used on the car. From there, the visual direction comes from the tire series and sidewall treatment, with blackwall options for a restrained look and redline or RWL options for a more customized presentation.
Because this is a modern luxury sedan rather than an earlier classic, appearance choices usually center on preserving the car's stance and overall proportion. Matching the correct 18-inch, 19-inch, or 20-inch fitment matters more than chasing a generic style cue that may not suit the wheel package already installed.
How does tire construction affect the appearance of a restored 2008 Audi A8 Quattro?
On a 2008 Audi A8 Quattro, appearance differences come less from construction changes and more from profile, wheel diameter, and sidewall styling, since the primary fitments are all radial. The visual shift is mostly between the 18-inch, 19-inch, and 20-inch packages and whether the tire uses blackwall, redline, or RWL sidewalls.
For a restoration-minded owner, the cleanest result usually comes from choosing the right size for the existing wheel package and keeping the overall look consistent across all four corners. Sidewall treatment can subtly change the car's character, but the correct size and proportion are what preserve the intended visual balance.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Audi A8 Quattro?
Yes, modifications can affect tire fitment on a 2008 Audi A8 Quattro, especially when wheel diameter, wheel width, offset, or ride height has been changed. Since this car already uses three different primary sizes, even a small setup change can alter which tire size remains appropriate for the available clearance.
A modified car should be checked for wheel-to-suspension clearance, fender clearance, and steering travel before a replacement tire is chosen. That matters most when moving between the 18-inch, 19-inch, and 20-inch packages, because the size code must match the actual wheel and work within the vehicle's current setup.
What should I inspect before driving a 2008 Audi A8 Quattro on new tires?
Before driving a 2008 Audi A8 Quattro on new tires, inspect wheel condition, verify the tire size matches the wheel diameter, and confirm proper inflation. It is also wise to check for suspension wear, uneven previous tire wear, and any signs that alignment or wheel damage may have contributed to the last set's condition.
A careful inspection helps the new tires wear correctly and keeps the car stable at road speed. The owner should also look for clearance issues at full steering lock and under compression, particularly if the car has aftermarket wheels or has moved from one of the original wheel-diameter packages to another.
What should I check before a longer drive in a 2008 Audi A8 Quattro?
Before a longer drive, check tire pressure, tread condition, and the sidewalls for cuts, cracking, or bulges. A 2008 Audi A8 Quattro should also be checked for slow air loss and any vibration or irregular wear that could point to balance, alignment, or suspension issues.
Longer trips put more heat and sustained speed into the tire, so small problems become easier to feel and harder to ignore. It also makes sense to confirm that all four tires match the intended size for the wheel package on the car and that none are crowding the fenders or inner suspension areas.
