The 2001 Audi S4 sits in an especially appealing spot for enthusiasts who want compact luxury, all-weather capability, and serious twin-turbo performance in a usable modern-classic package. In sedan and Avant form, this generation earned its reputation through understated styling and strong tuning potential rather than flashy excess. Tire fitment is refreshingly straightforward, with the 2001 Audi S4 using a 225/45R17 radial on a 17-inch wheel across the covered sub-models. Available choices include blackwall performance radials as well as Pro-Trac Street Pro III options with raised white letter or redline sidewalls. The real decision is choosing the right look, series, and wheel-compatible specification for how the car is driven and presented.
Which Tire Size Is Right for The 2001 Audi S4
The 2001 Audi S4 uses one primary tire size: 225/45R17. It is a radial fitment for a 17-inch rim, and that same size carries across both the Base and Avant versions. That means the key decision is not sorting through multiple factory sizes, but choosing the right tire within 225/45R17 based on sidewall style, tire series, intended use, and wheel-width compatibility.
A 225/45R17 size uses a 225-millimeter nominal section width, a 45-series aspect ratio, radial construction, and a 17-inch rim diameter. On the 2001 Audi S4, this modern metric radial format matches the car's performance-oriented character and keeps the fitment in the sizing language most owners expect on a newer collector-era Audi. Available choices include BFGoodrich, Nitto, and Pro-Trac products, mostly in blackwall form, with raised white letter and redline alternatives also available. This size is the right starting point when the car remains on its original wheel diameter and the goal is selecting the right balance of appearance, series, and wheel match.
Tire fitment is consistent across the covered 2001 Audi S4 sub-models. Both the Base and Avant use the same 225/45R17 radial size, so the main focus is matching the tire to the car's wheel setup, appearance preference, and intended road use rather than sorting through different sub-model-specific sizes.
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2001 Audi S4 Avant
The 2001 Audi S4 Avant uses the same 225/45R17 radial fitment as the other covered S4 configuration. That keeps tire selection centered on choosing the right series, sidewall treatment, and wheel-compatible specification for a wagon that may be driven regularly or kept as a clean modern-classic.
The 2001 Audi S4 Base also uses 225/45R17 radial tires on a 17-inch wheel. That makes the decision more about product choice than fitment differences, especially when comparing blackwall performance tires with appearance-driven options such as raised white letter or redline sidewalls.
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 2001 Audi S4 Tires for Sale
Available 225/45R17 choices for the 2001 Audi S4 include BFGoodrich, Nitto, and Pro-Trac radials across several performance-oriented series. Most are blackwall tires, while Street Pro III options add raised white letter and redline sidewall treatments for owners who want a more distinctive presentation.
These FAQs focus on 2001 Audi S4 tire size, 17-inch rim fitment, available radial choices, sidewall and brand differences, and the practical checks that matter before regular driving or after wheel and suspension changes.
Tire Size & Fitment
What tire size fits a 2001 Audi S4?
The 2001 Audi S4 uses a 225/45R17 radial tire. That primary fitment applies to both the Base and Avant versions covered here, making tire sizing simpler than on vehicles with multiple factory wheel packages or trim-specific changes.
Using the correct size is only the first step. It is still smart to confirm that the car is actually wearing 17-inch wheels, especially if it has been modified over the years. Once wheel diameter is confirmed, the next choices are sidewall style, tire series, and whether the wheel width matches the tire's approved range.
What size rim does a 2001 Audi S4 use?
The primary tire fitment for the 2001 Audi S4 is built around a 17-inch rim. The 225/45R17 size itself confirms that wheel diameter, since the final number in the size code refers to the rim diameter in inches.
Wheel diameter matters because a 17-inch tire must be mounted on a 17-inch wheel. Width matters too, particularly when comparing performance radials with different approved rim-width ranges. A quick check of the actual wheel on the car helps prevent ordering a tire that matches the diameter but is not well suited to the wheel width.
Do all 2001 Audi S4 sub-models use the same tire size?
Yes. The covered 2001 Audi S4 sub-models use the same 225/45R17 radial tire size. That includes both the Base and Avant, so there is no split in primary fitment between the sedan and wagon versions here.
That shared fitment keeps the selection process straightforward, but the actual car should still be checked before replacing tires. A previous owner may have installed different wheels or suspension parts, and those changes can affect clearance and tire choice even when the original year-make-model fitment remains consistent.
Choosing the Right Tire
What should I consider when choosing a 225/45R17 tire for a 2001 Audi S4?
Start with the correct 225/45R17 size, then compare construction, sidewall style, series, and wheel-width compatibility. Since the 2001 Audi S4 uses a radial fitment, the choice is really about which radial best suits the car's appearance and intended use rather than deciding between multiple primary sizes.
A blackwall performance tire keeps the presentation clean and modern, while raised white letter or redline options add more visual character. It also helps to compare weight and maximum load figures where available, especially if the car sees regular road use. Matching the tire to the actual wheel width is one of the most important practical checks.
What sidewall styles are available for 2001 Audi S4 tires?
The available 225/45R17 choices for a 2001 Audi S4 include blackwall, raised white letter, and redline sidewall styles. Blackwall appears across several BFGoodrich and Nitto options, while Pro-Trac Street Pro III adds the raised white letter and redline alternatives.
Sidewall style does not change the underlying tire size, but it can change the car's overall presentation quite a bit. A blackwall tire suits an understated factory-inspired look, while redline or raised white letter can push the S4 toward a more personalized appearance. The best choice depends on whether the car is being preserved, modified, or styled for a certain era-inspired look.
What brands offer tires for the 2001 Audi S4?
225/45R17 tires for the 2001 Audi S4 are available from BFGoodrich, Nitto, and Pro-Trac. Those brands cover several radial tire series, giving owners a useful spread of options without changing the original fitment size.
Brand alone should not be the whole decision. It is better to compare each tire's series, sidewall style, rim-width specification, and any available load information in addition to the name on the sidewall. That approach helps narrow the choice to a tire that suits the car's wheels, visual style, and expected driving use.
Restoration & Appearance
Which tire should I choose for a period-style 2001 Audi S4?
A period-style 2001 Audi S4 starts with the correct 225/45R17 radial size on a 17-inch rim. From there, a blackwall tire usually preserves the understated look many owners want from an early-2000s German sport sedan or Avant without introducing a more overtly customized sidewall treatment.
Appearance still depends on the overall build. A cleaner, more original-style car may benefit from a subtle blackwall performance radial, while a personalized S4 can support a more expressive sidewall choice. When exact originality matters, compare the tire decision against period photos, marque references, and the wheel setup actually on the car.
How does tire construction affect the appearance of a restored 2001 Audi S4?
On a 2001 Audi S4, tire construction is straightforward because the primary fitment is already a radial. That means appearance differences come less from choosing between bias-ply and radial construction, and more from sidewall treatment, tread style, and the overall stance created by the wheel-and-tire package.
For a restoration-minded owner, keeping the correct 225/45R17 size is usually the foundation of the look. After that, the visual choice becomes whether the car should remain restrained with a blackwall tire or lean into a more customized presentation with redline or raised white letter sidewalls. Even subtle sidewall changes can alter how authentic or modified the car appears.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2001 Audi S4?
Yes. A 2001 Audi S4 may start with a 225/45R17 tire on a 17-inch wheel, but aftermarket wheels, altered offsets, suspension changes, or body modifications can change what works on the car. Even when the nominal tire size stays the same, the actual fit can shift.
That is why it helps to inspect the wheel dimensions and look closely at steering, inner-fender, and suspension clearance before replacing tires. Lowered cars deserve extra attention, and wider aftermarket wheels can move the tire inward or outward enough to create issues that are not obvious until the car is driven.
What should I inspect before driving a 2001 Audi S4 on new tires?
Before regular road use, check that the 2001 Audi S4's tires are mounted on the correct 17-inch wheels, properly inflated, and free from obvious damage. The wheels should be in sound condition, and the tires should clear suspension components and bodywork through the full steering range.
A short inspection drive is worthwhile after installation. Listen for rubbing, feel for vibration, and recheck air pressure after the first miles. It also makes sense to look at alignment and suspension condition on a performance car like the S4, since worn components can shorten tire life or mask a fitment problem.
How should 225/45R17 tires on a collector 2001 Audi S4 be maintained?
225/45R17 tires on a collector-grade 2001 Audi S4 should be checked regularly for air pressure, uneven wear, sidewall cracking, bulges, cuts, and signs of long-term aging. Cars that are driven infrequently often need more attention than daily drivers because tire condition can decline long before the tread is worn out.
Storage conditions matter too. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires between drives. It also helps to move the car periodically and inspect each tire closely before a longer outing, since low-use vehicles can hide flat spotting or slow air loss until road time returns.
