The 2006 Audi A8 Quattro sits in the era when Audi’s flagship sedan blended all-wheel-drive confidence with understated high-luxury performance. Its aluminum-intensive design, long-distance composure, and available W12 power make tire choice especially important because the car’s refinement depends on getting size, wheel diameter, and load-appropriate construction right. This model uses radial tire fitments in 255/45R18, 255/40R19, and, on select configurations, 275/35R20. Available choices range from blackwall performance-oriented radials to raised white letter and redline presentations. The right selection comes down to confirming the exact sub-model and wheel package, then matching the tire’s appearance and character to how the car is actually driven.
Which Tire Size Is Right for The 2006 Audi A8 Quattro
Three tire sizes apply to the 2006 Audi A8 Quattro, and the correct one depends on the exact sub-model and wheel diameter. Both the 4.2 and A8 Quattro L 4.2 use 18-inch or 19-inch fitments, while the A8 Quattro L W12 can also use a 20-inch setup. Before choosing a tire, confirm the specific sub-model and the wheel diameter currently on the car, especially if the vehicle has been changed from its original wheel package.
A 255/40R19 tire uses a 255-millimeter section width, a 40-series aspect ratio, radial construction, and a 19-inch rim. On the 2006 Audi A8 Quattro, this is a modern performance-oriented fitment that suits the car’s luxury-sedan handling balance while maintaining the correct construction type for the platform. Product choices include BFGoodrich and Pro-Trac options across g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Street Pro III lines, with blackwall, raised white letter, and redline sidewall treatments. This size is worth considering when the car is equipped with 19-inch wheels and the goal is to preserve the intended wheel-to-tire proportion.
A 255/45R18 tire has the same 255-millimeter nominal width as the 19-inch option, but it uses a taller 45-series profile on an 18-inch rim. For the 2006 Audi A8 Quattro, this radial size appears on both the 4.2 and A8 Quattro L 4.2, making it an important fitment to confirm on cars with the smaller wheel package. Available choices include BFGoodrich, Nitto, and Pro-Trac, with blackwall, raised white letter, and redline presentations across several tire series. This size deserves attention when maintaining the correct 18-inch wheel setup matters as much as the tire’s brand or sidewall appearance.
A 275/35R20 tire combines a wider 275-millimeter section with a lower 35-series profile and a 20-inch rim diameter. On the 2006 Audi A8 Quattro, this size is associated with the A8 Quattro L W12 and represents the largest primary wheel-and-tire package used within the model range. BFGoodrich, Nitto, and Pro-Trac offer options here, including blackwall, raised white letter, and redline styles across g-Force Comp 2 AS, g-Force Phenom T/A, NT555 G2, and Street Pro III series. This fitment should be evaluated carefully whenever wheel diameter, width, and clearance need to stay aligned with a W12 car’s 20-inch setup.
Sub-model fitment is not identical across the 2006 Audi A8 Quattro range, even though the 18-inch and 19-inch sizes overlap across most versions. Checking the exact sub-model matters because the L W12 adds a 20-inch tire option that does not apply across the rest of the lineup.
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2006 Audi A8 Quattro 4.2
The 2006 Audi A8 Quattro 4.2 uses the 255/45R18 and 255/40R19 radial fitments. Tire selection starts with confirming whether the car is on 18-inch or 19-inch wheels, then choosing among the available brands, series, and sidewall styles that suit the car’s desired appearance and use.
The 2006 Audi A8 Quattro L 4.2 shares the same 255/45R18 and 255/40R19 radial sizes as the standard 4.2. That makes wheel-diameter confirmation the key first step, followed by deciding whether a more understated blackwall look or a more distinctive sidewall treatment better matches the car.
The 2006 Audi A8 Quattro L W12 can use 255/45R18, 255/40R19, or 275/35R20 radial tires. Because this sub-model spans three wheel diameters, tire choice depends first on verifying the wheels actually on the car before comparing the available product styles and specifications within that 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 2006 Audi A8 Quattro Tires for sale
Available 2006 Audi A8 Quattro tires span 255/45R18, 255/40R19, and 275/35R20 radials from BFGoodrich, Nitto, and Pro-Trac. Choices vary by tire series and sidewall presentation, with blackwall, raised white letter, and redline options appearing across the lineup.
Owners of a 2006 Audi A8 Quattro usually need to sort out the exact tire size, wheel diameter, and sub-model before comparing brands or sidewall styles. These FAQs focus on fitment, radial tire choices, appearance options, and the checks that matter before road use.
Tire Size & Fitment
What tire size fits a 2006 Audi A8 Quattro?
The 2006 Audi A8 Quattro uses three radial tire sizes across the model range: 255/45R18, 255/40R19, and 275/35R20. The 4.2 and A8 Quattro L 4.2 use the 18-inch and 19-inch sizes, while the A8 Quattro L W12 can also use the 20-inch fitment.
The key step is matching the tire size to the exact sub-model and the wheel diameter currently on the car. A8s are often sensitive to wheel-package changes, so checking the tire sidewall and measuring the wheel diameter before ordering helps avoid choosing a correct Audi size for the wrong wheel setup.
What size rim does a 2006 Audi A8 Quattro use?
A 2006 Audi A8 Quattro can use 18-inch, 19-inch, or 20-inch rims, depending on the sub-model and tire size. The 255/45R18 tire fits an 18-inch rim, the 255/40R19 fits a 19-inch rim, and the 275/35R20 fits a 20-inch rim.
Rim diameter should be confirmed before anything else because the three tire sizes are tied to three different wheel diameters. The next check is wheel width and overall setup, especially on cars with aftermarket wheels, since the correct rim diameter alone does not guarantee the rest of the fitment matches the tire you plan to use.
Do all 2006 Audi A8 Quattro sub-models use the same tire size?
No. The 2006 Audi A8 Quattro 4.2 and A8 Quattro L 4.2 use 255/45R18 and 255/40R19, while the A8 Quattro L W12 uses those two sizes plus 275/35R20. All of these are radial fitments, but they are not shared evenly across every sub-model.
That difference matters because a tire that is correct for one A8 Quattro version may not be appropriate for another car with a different wheel package. Identifying the exact sub-model, then confirming the actual wheel diameter on the vehicle, is the most reliable way to narrow the tire search before comparing brands or sidewall styles.
Choosing the Right Tire
What should I consider when choosing a 2006 Audi A8 Quattro tire?
Start with the exact tire size and wheel diameter used on the car, since the 2006 Audi A8 Quattro spans 18-inch, 19-inch, and 20-inch fitments. After that, compare construction, brand, tire series, sidewall style, and any load-related specifications that are relevant to the size you need.
The best choice usually depends on how the car is used and how the owner wants it to look. A blackwall tire keeps a restrained modern appearance, while redline or raised white letter options create a more custom presentation. Wheel width, tire clearance, and the current setup should still be checked before making a final selection.
What sidewall styles are available for 2006 Audi A8 Quattro tires?
Sidewall choices for the 2006 Audi A8 Quattro include blackwall, RWL, and redline, depending on the tire size and product line. Blackwall appears across BFGoodrich and Nitto offerings, while Pro-Trac Street Pro III adds raised white letter and redline presentations in the covered sizes.
That gives the car a wider appearance range than many late-model luxury fitments. Buyers who want a subtle OEM-like visual direction often stay with blackwall, while custom-oriented builds may lean toward RWL or redline. The sidewall style should be chosen only after confirming the correct size, since appearance options vary within each wheel diameter.
What brands offer tires for the 2006 Audi A8 Quattro?
Tires for the 2006 Audi A8 Quattro are available from BFGoodrich, Nitto, and Pro-Trac across the supported radial sizes. Depending on size, the available series include g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
Brand choice should be part of a larger comparison rather than the only decision. It helps to look at the specific size needed, the series offered in that size, the sidewall treatment, and the wheel-width compatibility where stated. That approach keeps the focus on fitment and intended character instead of assuming every brand offers the same presentation.
Restoration & Appearance
Which tire should I choose for a period-style 2006 Audi A8 Quattro?
A period-style 2006 Audi A8 Quattro usually starts with keeping the correct radial size for the car’s actual wheel diameter, then choosing a tire whose overall presentation matches the sedan’s clean, understated character. In many cases, that means looking first at blackwall options in 255/45R18, 255/40R19, or 275/35R20.
The car’s late-classic luxury design generally rewards restraint, so tire appearance matters nearly as much as size. Owners building a more personalized car may still prefer redline or raised white letter styling, but a restoration-oriented approach should begin with the proper wheel-and-tire fitment and then evaluate appearance details in that context.
How does tire construction affect the appearance of a restored 2006 Audi A8 Quattro?
Construction is straightforward on the 2006 Audi A8 Quattro because all primary fitments are radial. That means the appearance differences come less from bias-ply-versus-radial decisions and more from sidewall style, tread presentation, and how the tire’s profile works with the wheel diameter on the car.
For a restoration-oriented sedan, keeping the correct radial size and wheel diameter usually has the strongest visual effect. An 18-inch, 19-inch, or 20-inch setup changes the stance and proportion immediately, and sidewall style fine-tunes the result. A careful selection keeps the car looking intentional rather than simply wearing whatever tire happened to fit.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2006 Audi A8 Quattro?
Yes. A 2006 Audi A8 Quattro can be affected by aftermarket wheels, altered wheel widths, suspension changes, or ride-height modifications, even when the tire size itself looks close to stock. Those changes can influence clearance at the fender, steering components, and suspension as the car moves through its travel.
That is especially important on a model with multiple wheel diameters and low-profile fitments. Any car that has been lowered, fitted with non-original offsets, or moved to a different wheel package should have tire-to-body and tire-to-suspension clearance checked carefully before road use, rather than assuming the nominal size tells the whole story.
What should I inspect before driving a 2006 Audi A8 Quattro on new tires?
Before driving a 2006 Audi A8 Quattro on new tires, inspect inflation pressure, bead seating, tread and sidewall condition, wheel fastener torque, and the basic wheel-and-tire clearance at full steering lock. It also helps to confirm that all four tires match the intended size and construction for the vehicle’s current setup.
A short, careful test drive can reveal rubbing, vibration, or imbalance before the car is used at highway speed. This is a heavy luxury sedan with Quattro all-wheel drive, so stable road manners depend on a sound overall setup. Any sign of air loss, contact, or unusual behavior should be addressed before regular driving.
What should I check before a longer drive in a 2006 Audi A8 Quattro?
Before a longer drive, check tire pressure when cold, inspect the tread and sidewalls for cracking, cuts, or bulges, and look for uneven wear that could point to alignment or suspension issues. On a 2006 Audi A8 Quattro, it is also wise to confirm that the tires match the correct wheel diameter and remain properly balanced.
Low-use luxury cars can age out tires before they wear them out, so appearance alone is not enough. A longer trip puts more heat and sustained load into the tire, which makes existing problems show up quickly. Paying attention to condition, pressure stability, and any stored-vehicle aging issues helps the car stay composed on the road.
