2001 Audi S4 Wheel Interchange

tl;dr

2001 Audi S4 basics: 5x112, 57.1 center bore, M14x1.5 wheel bolts. Known OEM wheel spec on this page lists 18x7.5 ET45 with 5.52 in backspacing, and a 225/45R17 tire size. That tire size pairs with a 17 inch rim, so trims or packages may differ. Use the on-page calculator and your VIN, door placard, or owner’s manual to confirm what your car shipped with before buying.

Recommendation

Start from the OEM baseline below. Keep offset changes small and check both inner and outer clearance in the calculator. Match the 57.1 mm hub with hub-centric rings if your donor wheel bore is larger. Use M14x1.5 bolts that match the wheel’s seat type. Test fit, then torque properly and recheck after a short drive.

Known OEM fitment for 2001 Audi S4

Values listed are what we have for this page. They may vary by trim or package. Do not assume if your car differs. Confirm with the calculator and OEM sources.

Note the wheel and tire diameters above do not match. Some cars may be on 17 inch wheels from factory. Verify your door placard and compare in the calculator before proceeding.

Impact of changing size or offset

• Offset moves the wheel in or out. One millimeter of offset changes poke and inner clearance by one millimeter.
• Wider wheels move both inner and outer lips. Half the width increase affects the strut side. The other half affects fender poke.
• Bigger tires change overall diameter. The calculator updates tire diameter and shows speedometer change.
• Backspacing rises with higher offset or width. More backspacing can hit struts or liners.
• Smaller center bores will not fit. Larger bores need hub-centric rings to 57.1.

Risks and gotchas

• Brake caliper clearance is not guaranteed by bolt pattern alone. Check spoke and barrel clearance with the calculator and a test fit.
• Fender and liner rub can occur at full lock or compression. Inspect outer lip and inner liner with suspension loaded.
• Mismatched bolt seat types cause loosening and vibration. Confirm the wheel seat and buy matching M14x1.5 hardware.
• Hub bore mismatch without rings leads to vibration. Use rings to step down to 57.1 mm when needed.
• Incorrect tire diameter affects gearing, speedometer, and ABS logic. Keep the calculator’s delta small and measurable.
• Do not rely on guesses for torque. Use an accurate torque wrench and a clean, dry interface.

How to use the calculator on wheelinterchange.com

1. Confirm your baseline

• Select Installed on: 2001 Audi S4.
• If your door placard shows a different wheel or tire, edit the custom sizes to match your actual baseline.

2. Load a donor wheel

• Pick Wheels from: the donor vehicle, or enter a custom wheel size.
• Enter wheel width and offset. The tool shows inner and outer position change.

3. Adjust tire size

• Set a custom tire size if you are upsizing or downsizing.
• Watch overall diameter and speedometer change. Keep differences conservative for street use.

4. Check clearances

• Review inner clearance to strut and liner.
• Check outer poke to fender edge. Aim for safe margins in both directions.

Minimal tool checklist

• Torque wrench: search on Amazon
• M14x1.5 wheel bolts that match your wheel seat: search on Amazon
• Hub-centric rings to 57.1 mm if your wheel bore is larger: search on Amazon
• Wheel hanger guide pin M14x1.5 for safer installs: search on Amazon

Next actions

• Verify your current wheel and tire sizes from the door placard, VIN data, or owner’s manual.
• Enter your confirmed baseline into the calculator to lock the comparison.
• Evaluate donor wheels against 5x112, 57.1 mm bore, and M14x1.5 hardware needs.
• Model offset and width changes. Aim for safe inner and outer clearance.
• Order the correct bolts and hub-centric rings if required.
• Test fit one corner, spin by hand, check full lock both directions.
• Torque in a star pattern. Re-torque after a short drive.

You now have a clear path to select and fit wheels on your 2001 Audi S4 with safety and confidence.