The 2007 Audi S4 sits in an era when Audi blended discreet executive styling with genuine V8 performance, giving the B7-platform S4 a loyal following among enthusiasts who want everyday usability with serious road manners. Whether in sedan-like Base form, Avant wagon, or Cabriolet, tire choice plays a major role in preserving the car’s balanced character. This 2007 Audi S4 uses a 235/40R18 radial tire on an 18-inch rim across its covered sub-models. Available choices center on modern blackwall performance radials from BFGoodrich and Nitto in several series. For most owners, the decision is less about size and more about matching the right tire to the car’s condition, wheel setup, and intended use.
Which Tire Size Is Right for The 2007 Audi S4
The 2007 Audi S4 uses one primary tire size: 235/40R18, a modern metric radial fitted to an 18-inch rim. That same size carries across the Avant, Base, and Cabriolet, so the main decision is choosing the right tire within that fitment by comparing tire series, rim-width compatibility, load specifications, and the kind of driving or ownership style the car will see.
A 235/40R18 size uses a 235-millimeter nominal section width, a 40-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2007 Audi S4, this modern low-profile radial format suits the car’s sport-oriented setup and is shared across the covered sub-models. Available choices in this size include blackwall offerings from BFGoodrich and Nitto across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This is the size to evaluate if your goal is maintaining the intended wheel diameter while selecting a tire that matches your current wheel width and road-use priorities.
Tire fitment is straightforward across the covered 2007 Audi S4 sub-models because each one uses the same 235/40R18 radial size on an 18-inch rim. Checking the exact sub-model still matters when reviewing the car’s current wheels, condition, and intended use, especially if it has been modified over time.
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2007 Audi S4 Avant
The 2007 Audi S4 Avant uses the same 235/40R18 radial fitment as the other covered S4 variants. That keeps tire selection focused on choosing among the available blackwall performance radial options and confirming that the wagon still has the correct 18-inch wheel setup.
The 2007 Audi S4 Base also uses the 235/40R18 radial size, so fitment does not branch into alternate primary sizes. The real comparison is between the available tire series, load specifications, and rim-width compatibility within that established 18-inch fitment.
The 2007 Audi S4 Cabriolet shares the same 235/40R18 radial tire size as the other covered sub-models. That makes size selection simple, while still leaving room to compare tire series and verify that the current wheel and suspension setup supports the intended fitment cleanly.
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 2007 Audi S4 Tires for Sale
Available 235/40R18 choices for the 2007 Audi S4 focus on blackwall radial performance tires from BFGoodrich and Nitto. The product grid lets you compare several g-Force series and the Nitto NT555 G2, along with rim-width compatibility, weight, and load specifications within the same core fitment.
Owners of a 2007 Audi S4 usually want clear answers about the 235/40R18 fitment, 18-inch rim compatibility, available radial tire choices, and what to inspect before putting a performance-oriented S4 back on the road.
Tire Size & Fitment
What tire size fits a 2007 Audi S4?
The 2007 Audi S4 uses a 235/40R18 radial tire. That primary size applies across the covered Avant, Base, and Cabriolet sub-models, making fitment more straightforward than on vehicles that split tire sizes by trim or wheel package.
Even with one main size, it is still worth checking the actual wheels on the car before choosing a tire. Many performance cars pick up aftermarket wheels over time, and wheel width or suspension changes can affect how a 235/40R18 tire sits and clears at full steering lock or over suspension travel.
What size rim does a 2007 Audi S4 use?
The primary tire fitment for the 2007 Audi S4 uses an 18-inch rim diameter. The 235/40R18 size is built around that 18-inch wheel, so matching rim diameter is the first non-negotiable part of selecting the correct tire.
Rim diameter alone is not the whole fitment story. Product options in this size are intended for wheel widths in roughly the 8.0- to 9.5-inch range, so the actual wheel width should also be confirmed before installation. That matters even more if the car has replacement wheels rather than its original-style setup.
Do all 2007 Audi S4 sub-models use the same tire size?
Yes. The covered 2007 Audi S4 sub-models share the same 235/40R18 radial tire size, including the Avant, Base, and Cabriolet. There is no split in primary tire size among those versions on this page.
That consistency makes product comparison easier because the decision shifts from identifying the correct size to selecting the right tire within it. Owners can focus on wheel-width compatibility, load specification, tire series, and how the car is used, while still checking for modifications that may have altered actual fitment on the vehicle.
Choosing the Right Tire
What should I consider when choosing a 235/40R18 tire for a 2007 Audi S4?
Start with the confirmed fitment: 235/40R18 radial on an 18-inch rim. From there, compare the tire series available in that size, along with wheel-width compatibility, load figures where stated, and whether the car is used for spirited road driving, regular street use, or occasional fair-weather mileage.
The best choice depends on how closely the current wheel setup matches the intended tire and how the S4 is actually driven. A car with stock-style wheels and suspension may call for a different selection approach than one with replacement wheels, alignment changes, or a lower ride height that alters clearance margins.
What sidewall styles are available for 2007 Audi S4 tires?
The available 235/40R18 options for the 2007 Audi S4 use a blackwall sidewall style. That gives the car a clean, contemporary performance presentation that suits the S4’s understated appearance without introducing vintage-style whitewalls or stripe treatments.
Since sidewall styling does not vary here, the more useful comparison points are tire series, brand, rim-width range, weight, and load specification. That simplifies the visual decision and lets owners concentrate on selecting a radial tire that matches the car’s wheel setup and the kind of road use it will see.
What brands offer tires for the 2007 Audi S4?
BFGoodrich and Nitto offer tires in the 235/40R18 fitment for the 2007 Audi S4. Within those brands, the available choices include several BFGoodrich g-Force series and the Nitto NT555 G2, all in blackwall radial form.
Brand alone should not be the only deciding factor. It helps more to compare the exact tire series, the wheel-width range each tire supports, and any stated load figures that matter for your car’s setup. That approach keeps the focus on fitment and intended use rather than treating every tire in the size as interchangeable.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2007 Audi S4?
Yes. A 2007 Audi S4 may use the standard 235/40R18 size, but aftermarket wheels, suspension lowering, alignment changes, or body modifications can alter how that tire fits in practice. Even when the size code stays the same, wheel width and clearance can change the outcome.
That is why the actual car should be checked before replacing tires. Look at wheel diameter and width, inspect clearance at the fender and suspension, and turn the steering through its range if the setup has been changed. Those steps help confirm that the chosen 235/40R18 tire suits the car as it sits now.
What should I inspect before driving a 2007 Audi S4 on new tires?
Before road use, inspect tire pressure, bead seating, lug torque, tread and sidewall condition, and basic wheel condition. On a performance-oriented car like the 2007 Audi S4, it is also smart to check alignment condition and make sure there is no rubbing at normal ride height or during steering movement.
A car that has spent long periods parked deserves extra attention. Look for suspension wear, leaking dampers, uneven old-tire wear patterns, and any sign that wheel or brake components could affect the new tires once the car is back in use. A short, cautious test drive is a sensible final check before regular driving.
How often should tires on a 2007 Audi S4 be inspected?
Tires on a 2007 Audi S4 should be inspected regularly, not just by mileage. Performance cars often reveal alignment or suspension issues through tire wear, so checking pressure, tread wear, sidewall condition, and signs of cuts, cracking, or impact damage on a routine basis is worthwhile.
Cars that are driven infrequently need attention too, because age and storage conditions can matter as much as road miles. Inspect the tires before longer drives, after seasonal storage, and any time the car feels different on the road. Consistent checks help catch problems before they turn into clearance, vibration, or handling concerns.
