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2006 Audi S4 tire sizes & fitment

Approved tire and wheel sizes for the 2006 Audi S4, sourced from manufacturer fitment data and refreshed monthly.

Approved fitments

Tire size Rim size PCD (bolt pattern) Offset Load index Speed rating
235/40R18 OEM R18 5x112 N/A N/A N/A

2006 Audi S4 wheel bolt pattern & specs

Bolt pattern (PCD)5x112
Wheel thread / lug sizeM14x1.5
Center bore57.1 mm
Sourcebolt-pattern.com

The 2006 Audi S4 uses a 5x112 bolt pattern, M14x1.5 lug thread, and a 57.1 mm center bore. Bolt pattern and hub specs are stable across a model generation; always confirm against your vehicle's existing wheel before buying aftermarket wheels, spacers, or adapters. Source: community wheel-fitment reference data. Full wheel specs →

Best by use case

Four tires, four jobs

Best all-season

Bridgestone

Potenza sport

summer touring, UTQG 300

Best budget

Goodyear

Assurance MaxLife

Lowest cost per mile in this size; UTQG 820

Best quiet

Bridgestone

Turanza QuietTrack

68 dB cabin noise (EU label); quietest in this size

Best winter

Bridgestone

Blizzak WS90

Dedicated winter (premium compound); ice/snow grip

See the best tires for the Audi S4, ranked by category →

Tire recalls & safety complaints for the Audi S4 →

Compatible alternative sizes for 235/40R18

Sizes within the ETRTO ±3% overall-diameter safe-fit tolerance. Each row links to the size's own page.

Alternative size%Δ ODCategoryVerdict
265/45R16 -0.05% alternative Safe
205/40R19 0.22% plus 1 Safe
265/40R17 -0.22% alternative Safe
215/50R17 0.25% winter narrower Safe
235/35R19 0.29% plus 1 Safe

For the full list of alternatives with comfort/handling impact, see 235/40R18 upsize options. To check an arbitrary size pair, use the tire compatibility calculator.

Check a different size against this vehicle

Type any tire size below; we'll compute its overall-diameter delta against the OEM 235/40R18 and verdict using the ETRTO ±3% rule.

Common upgrade paths

Use the plus-size calculator to evaluate any rim step against the OEM size.

How to choose tires for the 2006 audi S4 sedan

The 2006 Audi S4 Sedan ships from the factory on 235/40R18 tires mounted on R18 wheels. Only one approved fitment is documented for this model year, so replacement options should match the original size exactly unless a plus-size upgrade is being considered. The Compatible alternative sizes table above lists every safe substitution within the ETRTO ±3% overall-diameter tolerance.

Tire choice on the Audi S4 comes down to three trade-offs that matter more than brand loyalty: load index (must equal or exceed the OEM number), speed rating (must match or exceed the placard), and UTQG treadwear (higher means longer life, lower usually means stickier rubber). Owners replacing factory tires with the same compound class, for example all-season for all-season, generally see no change in ride characteristics or fuel economy. Switching categories (performance summer to all-season touring, for example) is where the trade-offs show up at the contact patch.

For 2006 Audi S4 Sedan owners considering a plus-size upgrade, the safer option is a Plus-1 step (one rim size up with a 10-point aspect drop and ~10 mm of additional section width). Plus-2 is technically viable on this chassis if the alternative-sizes table lists a Plus-2 candidate within tolerance, but expect a meaningful ride-harshness penalty and a tire-cost premium of 30–60% per tire relative to the OEM fitment. For winter use the recommended pattern is one width step down (e.g. from a 235 to a 225) with the aspect ratio bumped up to preserve overall diameter; narrower tires apply higher contact pressure per square inch on snow, which translates directly into shorter braking distances. The plus-size calculator evaluates any specific rim step against this OEM size.

Before purchasing, verify the tire size on the driver-door placard of your specific 2006 Audi S4 Sedan, since trim levels and option packages can shift the original fitment from what is documented here. The placard reading is the authoritative source per FMVSS 110, and dealers will reference the placard rather than aftermarket catalogs when validating warranty claims.

NHTSA-reported issues for 2006 audi S4

51
Complaints
0
Crashes
0
Injuries
0
Deaths

Top issue category: Tires (General)

Most reported: Tires (General) (29) · Sidewall (20) · Tread / Belt (2)

Reported across: 2000 – 2004 (3 years)

What owners described

Sidewall failure appears in 61% of these reports; about 4.1× as often as across all tire complaints. Percentages are shares of the 28 reports covering every model year of the Audi S4 that include a written account; a single report can describe more than one problem, so they do not total 100%.

Reported problemThis subjectAll tire complaintsRelative
Sidewall failure 61% 15% 4.1×
Bubble or bulge in the tire 46% 6% 7.9×
Blowout or sudden deflation 14% 20% 0.7×
Cracking or dry rot 11% 9% 1.2×
Loss of control, rollover or collision 11% 8% 1.3×
Tread or belt separation 7% 13% 0.5×

Mileage at failure

16 of these reports state an odometer reading. The middle report is at 10,000 miles, with 8 in 10 falling between 2,000 and 23,200 miles.

In owners' own words

Verbatim excerpts from complaints filed with NHTSA about Audi S4. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.

HANKOOK TIRES, VENTUS S1 NOBLE 2 SPLITTING OUTSIDE SIDEWALL, CAUSED TO DEPRESSURE TIRE, WHICH CAUSED TO CRACK TIRE ON THE INNER SIDEWALL SUBSEQUENTLY LED TO MANUFACTURER CLAIM BLAME ON MY VEHICLE. THE TIRE MODEL IS UNDER A RECALL, BUT IN DIFFERENT SIZE, BUT IDENTICAL WALLS, MANUFACTURING PROCESS. MY VEHICLE'S TIRE SIZE 235/40/R18. RECALLED: VENTUS S1 NOBLE2 '245/45R18 96W', '245/40R19 94W', '275/35R19 96W PROPER TIRE PRESSURE WAS MAINTAINED AND CHECKED WEEKLY FOR 3YEARS, SINCE THE VEHICLE WAS PURCHASED.

NHTSA complaint 1486984 · 2004 vehicle

2 INCH BUBBLE IN EXTERIOR SIDEWALL OF FRONT DRIVER'S SIDE TIRE NOTICED WHILE CLEANING WHEELS. BRIDGESTONE DEALER SAID BUBBLE WAS DUE TO "ROAD HAZZARD DAMAGE" BUT NONE HAD OCCURRED. RESEARCHED PROBLEM ON "AUDI WORLD" WEBSITE AND FOUND NUMEROUS SIMILAR LOW*AK( DOT NUMBER: TIRE SIZE: 225/45R17 )

NHTSA complaint 218967 · 2000 vehicle

I DON'T KNOW THE DOT #'S ON THE TIRES. FIRST TIRE I PAID FOR MYSELF. DUE TO MANY COMPLAINTS ON AUDIWORLD.COM FORUMS, I PURCHASED ROAD HAZARD WARRANTY FOR ALL TIRES. SECOND TIRE WOULD HAVE BEEN COVERED UNDER ROAD HAZARD WARRANTY, BUT THERE WAS A NATIONAL SHARTAGE OF RE040'S AT THIS TIME. I THEN OBTAINED A USED REPLACEMENT FROM ANOTHER S4 OWNER THAT ALREADY SWITCHED TO ANOTHER TIRE. I'M MOVING SOON, SO PHONE# AND ADDRESS WILL CHANGE. THE PHONE# AND ADDRESS ARE MY PARENTS. MY PARENTS SHOULD GIVE YOU MY NEW PHONE# IF NEEDED. MAIL SENT TO MY PARENTS SHOULD ALSO GET TO ME WITHOUT PROBLEM. *AK( DOT NUMBER: TIRE SIZE: 245/45 R17 )

NHTSA complaint 228956 · 2000 vehicle

SIDEWALL BLISTER, 2IN.X1IN., DISCOVERED WHILE ROUTINE MAINTAINANCE PERFORMED. NO HISTORY OF ACCIDENT OR IMPACT INJURY TO TIRE OR WHEEL ASSEMBLY. AUTOMOBILE SERVICE TECHNICIAN REPORTS TIRE DEFECTIVE, CONFIRMS NO IMPACT INJURY TO VEHICLE SUSTAINED.( DOT NUMBER: EJH8CFE429 TIRE SIZE: 225/45/R17 )

NHTSA complaint 232357 · 2000 vehicle

Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA; they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.

Frequently asked questions

What size tires fit a 2006 Audi S4?
The OEM tire size for the 2006 Audi S4 is 235/40R18 mounted on R18 wheels.. Trim levels and option packages can shift the original fitment; confirm against your specific vehicle's driver-door placard before purchase.
What is the bolt pattern of a 2006 Audi S4?
The 2006 Audi S4 has a 5x112 bolt pattern with a 57.1 mm center bore and M14x1.5 wheel studs. Bolt pattern is consistent across the model generation; confirm against your existing wheel before fitting aftermarket wheels or adapters.
Can I run a different tire size on my 2006 Audi S4?
Plus-sizing (larger rim, lower aspect) is possible within ±3% of the OEM overall diameter per the ETRTO safe-fit standard. The Compatible alternative sizes table on this page lists every safe option for the OEM size. Always confirm with the manufacturer or a qualified tire shop before deviating from the placard.
Where can I buy tires for my 2006 Audi S4?
Online tire retailers in our affiliate network carry every size documented for this vehicle. Use the Shop online buttons above to compare prices across them; variance of $20–$40 per tire is common between merchants. The <a href="/tools/tire-install-cost-calculator/">install cost calculator</a> estimates the out-the-door including mount, balance, TPMS, and disposal by state.
What is the recommended tire pressure for the 2006 Audi S4?
The cold-inflation pressure is printed on the driver-door placard of your specific vehicle and varies by trim, tire size, and loaded vs unloaded condition. Typical OEM front and rear pressures fall between 30 and 36 psi for passenger trims and 32–40 psi for SUV/truck variants, but the placard is the authoritative source.
Can I fit winter tires in a different size on my 2006 Audi S4?
Yes; the standard winter-tire fitment pattern is one width step narrower than OEM (e.g. 225 → 215) with the aspect ratio bumped up to preserve overall diameter. Narrower tires increase contact pressure on snow for better traction. The Compatible alternative sizes table includes any winter-friendly options that fall within ±3% OD for this vehicle.
How often should I rotate the tires on my 2006 Audi S4?
Every 5,000–7,500 miles is the typical OEM recommendation for passenger vehicles. AWD vehicles and high-torque trucks benefit from the shorter interval. Documented rotation history is also a tire-warranty prerequisite; most manufacturer treadwear claims require rotation receipts at the warranty inspection.

For broader tire questions; replacement timing, UTQG, EV-specific tires, winter swaps; see the tire FAQ.

Sources for this page

  1. Vehicle owner's manual tire & wheel placard; door-jamb placard on the Audi S4 is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
  2. NHTSA SaferCar; recall lookup for the 2006 Audi S4.
  3. ETRTO 2024 Standards Manual §2.3; overall-diameter math used for the alternative-size verdicts above.
  4. Tire & Rim Association 2025 Yearbook; load-index to maximum-load reference.

Last verified 2026-09-02.