The 2009 Audi S5 arrived as a sleek V8-powered grand touring coupe that blended Audi’s modern performance character with everyday road manners and quattro confidence. It sits in an era when wheel and tire fitment became a major part of both the car’s stance and its sharp handling response. For this exact model, the primary tire size is 255/35R19, a modern metric radial on a 19-inch rim. That keeps the tire decision focused less on vintage-style construction choices and more on selecting the right radial within the correct size, series, and load specification. For road use, appearance, and handling balance, staying centered on the proper 19-inch fitment is the key first step.
Which Tire Size Is Right for The 2009 Audi S5
The 2009 Audi S5 uses one primary tire size: 255/35R19, and it is a radial fitment on a 19-inch wheel. The Base sub-model uses this same size, so the main decision is not between multiple factory sizes, but between the available radial tire choices within the correct dimensions, series, and wheel-width range.
255/35R19 is a modern metric radial size in which 255 refers to nominal section width in millimeters, 35 is the aspect ratio, R identifies radial construction, and 19 is the wheel diameter in inches. On the 2009 Audi S5, this low-profile radial sizing supports the car’s modern handling character and 19-inch wheel package. Available choices in this size include BFGoodrich options in the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series, all with Blackwall styling. This is the size to use when the car retains its original 19-inch wheel fitment and the goal is to compare tire character within the proper overall format.
Tire fitment is straightforward across the covered 2009 Audi S5 sub-models. The Base model uses the same primary size, so the important checks are wheel condition, correct 19-inch fitment, and choosing the right radial tire within that size.
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2009 Audi S5 Base
The 2009 Audi S5 Base uses the same 255/35R19 radial tire size as the core fitment. That makes selection more about comparing available Blackwall radial options, confirming wheel width, and making sure the car has not been altered with aftermarket wheels or suspension changes.
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 2009 Audi S5 Tires for Sale
Available 255/35R19 choices for the 2009 Audi S5 center on BFGoodrich radial tires with Blackwall styling. The main differences in the product grid come from tire series, weight, load specification, and the shared wheel-width fitment range for 19-inch applications.
These FAQs focus on the exact tire size used on the 2009 Audi S5, what 255/35R19 means, how to compare the available radial choices, and what to inspect before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2009 Audi S5?
The 2009 Audi S5 uses 255/35R19 tires. This is a modern metric radial size used on a 19-inch wheel, and the covered Base sub-model uses that same primary fitment.
That means the first job is confirming that the car still has the correct 19-inch wheel setup. Once that is established, the selection process shifts to comparing available tires in the proper 255/35R19 size rather than trying to sort through multiple original fitments.
What size rim does a 2009 Audi S5 use?
The primary tire fitment for the 2009 Audi S5 is built around a 19-inch rim diameter. The available 255/35R19 products in this application are intended for 19-inch wheels, with listed rim-width compatibility in the 8.5- to 10-inch range.
Rim diameter matters first, but wheel width still needs to be checked before choosing a tire. A car that has been fitted with aftermarket wheels should be measured carefully, since matching the 19-inch diameter alone does not confirm that every tire in this size will suit the exact wheel and vehicle setup.
What does 255/35R19 mean on a 2009 Audi S5?
In 255/35R19, the 255 is the nominal section width in millimeters, the 35 is the aspect ratio, the R means radial construction, and the 19 is the wheel diameter in inches. It is a low-profile performance-oriented sizing format rather than an older numeric or alphanumeric system.
For an Audi S5 owner, that translates into a tire with a short sidewall and a firm visual relationship to the 19-inch wheel. When comparing tires, keep the full size code in place so the overall fitment format stays consistent while series, weight, and other product details are evaluated.
Choosing the Right Tire
What should I consider when choosing a 255/35R19 tire for a 2009 Audi S5?
Start with the exact size, 255/35R19, and confirm that the car still uses a 19-inch wheel within the tire’s approved width range. From there, compare the available radial choices by tire series, load specification where stated, tire weight, and the kind of road use the car will actually see.
A lightly driven street car may be chosen differently than an S5 that sees more aggressive warm-weather use. The goal is to stay within the proper size and wheel fitment while selecting the tire character that best matches how the car is driven and presented.
What sidewall styles are available for 2009 Audi S5 tires?
The available 255/35R19 tire choices for the 2009 Audi S5 use Blackwall sidewalls. That keeps the appearance clean and modern, which suits the understated performance look of the S5 without introducing whitewalls, stripes, or raised-letter vintage treatments.
Since sidewall styling does not vary in this fitment, the bigger visual and functional differences come from tire series rather than sidewall design. An owner comparing options can focus more on construction details, wheel-width suitability, and intended use than on cosmetic sidewall treatment.
What tire series are available for the 2009 Audi S5?
The 2009 Audi S5 has 255/35R19 tire options in the BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. All are radial Blackwall tires built around the same basic fitment size and 19-inch wheel diameter.
Those series names help separate the choices in the product grid when the size itself stays constant. An owner can compare them by specification details such as weight, load information where shown, and wheel-width compatibility, then narrow the choice based on intended driving style and overall tire character.
Restoration & Appearance
Which tire should I choose for a period-style 2009 Audi S5?
A period-style approach for a 2009 Audi S5 starts with retaining the proper 255/35R19 radial fitment on a 19-inch wheel. Because this is a modern performance-era car, keeping the correct low-profile sizing usually matters more to the overall look than chasing decorative sidewall treatments.
The available Blackwall options preserve the clean presentation expected from this generation of S5. For an owner who wants the car to look right for its era, the safest path is to keep the original fitment format intact and avoid substitutions that change the wheel-to-sidewall proportion too noticeably.
Does correct tire fitment matter for a 2009 Audi S5 restoration?
Correct tire fitment matters on a 2009 Audi S5 because the car’s appearance and stance are closely tied to its 255/35R19 low-profile radial setup. Even on a newer collector car, the wrong overall tire format can make the wheel package look out of place and change the car’s visual balance.
A restoration-minded owner should confirm wheel diameter, wheel width, and the exact size before choosing among available products. When originality of presentation is especially important, period brochures, marque references, and vehicle-specific documentation can help confirm how the car should sit and look.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Audi S5?
Yes, modifications can affect tire fitment on a 2009 Audi S5 even when the nominal tire size stays at 255/35R19. Aftermarket wheels, changes in wheel width, offset differences, lowering springs, and suspension alterations can all influence how the tire sits in relation to the fenders and steering components.
A car that has been changed from stock should be checked carefully before a new set of tires is selected. Wheel dimensions, suspension height, and clearance at full steering lock are all worth verifying so the tire choice matches the car’s actual setup rather than its original configuration alone.
What should I inspect before driving a 2009 Audi S5 on new tires?
Before driving a 2009 Audi S5 on new tires, inspect the wheels for damage, confirm correct tire pressure, and make sure each tire is properly mounted in the correct 255/35R19 size. It is also wise to check for obvious alignment issues, uneven brake drag, or suspension wear that could affect early tire wear.
A short, careful road test can reveal vibration, rubbing, or pull that deserves attention before regular driving. Since the S5 uses a low-profile 19-inch fitment, any wheel damage, curb impact, or worn suspension component tends to show up quickly in ride quality and tire behavior.
How should 255/35R19 tires on a collector 2009 Audi S5 be maintained?
255/35R19 tires on a collector 2009 Audi S5 should be maintained with regular pressure checks, visual inspections for cuts or bulges, and routine monitoring for tread wear patterns. A car that is driven infrequently still needs attention, since age, storage conditions, and long stationary periods can affect tire condition.
Keeping the car away from prolonged sunlight, excess heat, and ozone sources can help protect the sidewalls during storage. It also helps to move the car periodically and inspect the tires before each drive so any cracking, air loss, or flat-spotting is caught before road use.
