The 2011 Audi A6 Quattro sits in the final years of Audi’s C6-era midsize luxury sedan and wagon lineup, a period when all-wheel-drive grip, understated styling, and high-speed touring comfort defined the car’s appeal. Buyers looking at this exact A6 Quattro are usually balancing factory-size accuracy with wheel-package confirmation, because fitment spans 17-, 18-, and 19-inch rim diameters. All three primary sizes use radial construction, with 245/45R17, 245/40R18, and 255/35R19 tied to different sub-model and wheel combinations. Tire choice then comes down to confirming the exact setup and selecting the right mix of sidewall style, tire series, and road-use character for the car’s intended look and use.
Which Tire Size Is Right for The 2011 Audi A6 Quattro
The 2011 Audi A6 Quattro uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel package. Those sizes are all radial, but they do not share the same rim diameter, so the first step is confirming whether the car is running 17-, 18-, or 19-inch wheels before comparing product styles or performance-oriented tire series.
245/40R18 is a metric radial size in which 245 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2011 Audi A6 Quattro, this size serves buyers who need an 18-inch fitment with modern radial construction and a low-profile look. Available choices include Blackwall, Redline, and RWL sidewall treatments across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, Street Pro III, and Drag Radial. It is the right size to evaluate only after confirming that the car’s wheel package actually uses an 18-inch rim.
245/45R17 is a metric radial size with a 245-millimeter nominal section width, a 45-series profile, radial construction, and a 17-inch rim diameter. For the 2011 Audi A6 Quattro, this size applies to certain 17-inch wheel combinations and keeps a slightly taller sidewall than the 18- and 19-inch alternatives. Product selection includes Blackwall, Redline, and RWL options, with series choices such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Street Pro III, and Drag Radial. It is the correct path only for cars that actually retain the 17-inch wheel setup tied to this fitment.
Fit(s): 3.0T (19 Inch Option), 4.2, and Avant 3.0T (19 Inch Option)
Construction: Radial|Rim: 19 in
255/35R19 is a metric radial size in which 255 is the nominal section width in millimeters, 35 is the aspect ratio, R marks radial construction, and 19 identifies the rim diameter. On the 2011 Audi A6 Quattro, this size is associated with 19-inch fitment and gives the car the lowest-profile primary option among the three sizes used here. Available tires center on Blackwall performance-oriented choices in the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. It should be considered only after confirming that the car’s wheel and sub-model configuration call for the 19-inch setup.
Sub-model fitment on the 2011 Audi A6 Quattro is not one-size-fits-all, because tire choice changes with both trim and wheel package. Checking the exact sub-model matters first, and confirming the actual wheel diameter matters just as much before selecting a tire.
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2011 Audi A6 Quattro 3.0T
The 2011 Audi A6 Quattro 3.0T uses either 245/45R17 or 245/40R18, both in radial construction. That means tire selection starts with confirming whether the car is on its 17-inch or 18-inch wheel setup, then comparing the available sidewall styles and tire series within that correct size.
The 2011 Audi A6 Quattro 3.0T (19 Inch Option) uses the 255/35R19 radial size. This makes wheel confirmation straightforward, and the main decision becomes choosing among the available Blackwall performance-oriented tire series built around that 19-inch package.
The 2011 Audi A6 Quattro 4.2 uses either 245/40R18 or 255/35R19, both as radial fitments. Buyers should verify whether the car is wearing 18-inch or 19-inch wheels before comparing tires, since the two sizes are not interchangeable simply because they belong to the same sub-model family.
The 2011 Audi A6 Quattro Avant 3.0T uses either 245/45R17 or 245/40R18 in radial construction. Tire choice depends on confirming the wagon’s actual wheel diameter first, then selecting the preferred combination of sidewall treatment, tire series, and intended road-use character.
The 2011 Audi A6 Quattro Avant 3.0T (19 Inch Option) uses the 255/35R19 radial size. With the 19-inch package confirmed, the decision shifts from fitment uncertainty to choosing the tire series that best matches the car’s look and driving purpose.
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 2011 Audi A6 Quattro Tires for Sale
Available 2011 Audi A6 Quattro tires span 245/45R17, 245/40R18, and 255/35R19, with options from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster. Buyers can compare Blackwall, Redline, and RWL sidewalls, along with series such as g-Force, Street Pro III, and Drag Radial depending on the exact size.
Common questions for the 2011 Audi A6 Quattro center on identifying the correct tire size by sub-model and wheel package, then comparing radial tire choices by sidewall style, brand, and intended use. Buyers also tend to ask about wheel fitment, modifications, and road-readiness checks before regular driving.
Tire Size & Fitment
What tire size fits a 2011 Audi A6 Quattro?
The 2011 Audi A6 Quattro uses three primary tire sizes: 245/45R17, 245/40R18, and 255/35R19. All three are radial sizes, but the correct fitment depends on the exact sub-model and wheel package rather than the A6 Quattro name alone.
Choosing the right one starts with confirming the car’s actual wheel diameter, since these sizes mount on 17-, 18-, and 19-inch rims. A quick check of the existing tire sidewall and wheel setup helps narrow the choice before comparing tire series, sidewall appearance, and other product differences.
What size rim does a 2011 Audi A6 Quattro use?
A 2011 Audi A6 Quattro can use 17-inch, 18-inch, or 19-inch rims, depending on the sub-model and wheel package. The matching tire sizes are 245/45R17 for 17-inch rims, 245/40R18 for 18-inch rims, and 255/35R19 for 19-inch rims.
Rim diameter should be confirmed before anything else because the tire size must match it exactly. Even within the same model year, different trims and wheel options use different diameters, so checking the wheel itself or the existing tire sidewall is the safest first step before selecting a replacement tire.
Why does the 2011 Audi A6 Quattro have more than one tire size?
More than one tire size applies to the 2011 Audi A6 Quattro because fitment varies by sub-model and wheel package. The 3.0T and Avant 3.0T can use 245/45R17 or 245/40R18, while 19-inch-option versions use 255/35R19, and the 4.2 can use 245/40R18 or 255/35R19.
That makes the first decision a vehicle-identification step rather than a brand or sidewall decision. Once the exact sub-model and wheel diameter are confirmed, comparing the available tires becomes much easier because the search can stay focused on the correct size instead of the whole A6 Quattro range.
Choosing the Right Tire
What should I consider when choosing a tire for a 2011 Audi A6 Quattro?
Start with the correct tire size for the exact sub-model and wheel package, since the 2011 Audi A6 Quattro uses 245/45R17, 245/40R18, or 255/35R19. After that, compare radial construction details, sidewall style, tire series, and any rim-width guidance tied to the specific product.
The best choice depends on how the car is used and how closely the owner wants to match the current wheel setup and appearance. A Blackwall performance tire, a Redline or RWL presentation, or a more specialized drag-oriented option can all make sense in the right size for the right purpose.
What sidewall styles are available for 2011 Audi A6 Quattro tires?
Sidewall choices for the 2011 Audi A6 Quattro include Blackwall, Redline, and RWL depending on tire size and product line. The 245/45R17 and 245/40R18 sizes offer the widest sidewall variety, while 255/35R19 options center on Blackwall tires.
That means appearance choice is not the same across every wheel package. Buyers who want a more distinctive visual treatment should first confirm that the car uses a size where Redline or raised white letter options are offered, then compare those tires against the intended use and wheel specifications.
What brands offer tires for the 2011 Audi A6 Quattro?
Tires for the 2011 Audi A6 Quattro are available from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster. Brand availability depends on size, with the broadest mix appearing in 245/45R17 and 245/40R18, while 255/35R19 centers on BFGoodrich offerings.
Brand comparison should come after size confirmation, because not every brand appears in every fitment. Once the correct size is established, it becomes easier to compare the available tire series, sidewall presentation, and load or rim-width details that may matter for the car’s setup and intended driving use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2011 Audi A6 Quattro?
Yes, modifications can affect tire fitment on a 2011 Audi A6 Quattro even when the tire size appears correct on paper. Aftermarket wheels, changes in wheel width, offset differences, suspension alterations, or lowered ride height can all change how a 245/45R17, 245/40R18, or 255/35R19 tire sits in the car.
That is why a modified car should be checked for wheel diameter, clearance at full steering lock, and space around the fenders and suspension before replacing tires. Matching the original size code alone does not account for changes that may have been made since the car left its original wheel setup.
What should I inspect before driving a 2011 Audi A6 Quattro on new tires?
Before driving a 2011 Audi A6 Quattro on new tires, inspect the wheel diameter, tire size, visible clearance, and general wheel condition. It also helps to confirm proper inflation, look for any rubbing points, and make sure the tires are seated correctly and free from obvious damage or air loss.
A short, careful road test is useful after installation, especially on cars with optional wheel packages or previous modifications. Steering feel, straight-line tracking, and any contact noise during turns can reveal issues early, before the car is taken on faster roads or longer trips.
What should I check before a longer drive in a 2011 Audi A6 Quattro?
Before a longer drive, a 2011 Audi A6 Quattro should have its tire pressures checked, tread and sidewalls inspected, and wheel fitment verified if the car has recently had tires installed or wheels changed. Any signs of cracking, bulges, cuts, or repeated air loss deserve attention first.
Longer trips put more heat and sustained load into the tire than short local use, so small issues become easier to notice. It is also wise to confirm that the car has the correct size for its wheel package and that nothing is contacting the tire under normal suspension movement.
