2010 Audi S4 Wheel Interchange

2010 Audi S4 Wheel Fitment Guide

tl;dr

The 2010 Audi S4 uses 5x112, 66.6 mm hub, M14x1.5 bolts. OEM wheels are 18x8 ET47 with 245/40R18 tires. Keep overall tire diameter close to stock. Match the bolt pattern, hub size, and bolt seat. Use the on-page calculator to validate width and offset changes before you buy.

OEM Baseline

Recommendation

Start from the OEM 18x8 ET47 and 245/40R18 reference. Choose wheels that are 5x112 and hub-centric to 66.6 mm. If the new wheel has a larger bore, use hub-centric rings to fit 66.6 mm. Keep overall tire diameter close to stock for speedometer and ABS stability. Aim for a small diameter change, ideally under about 2%.

Offset and width changes affect inner clearance and fender poke. Use the calculator with the OEM set as “Installed on” and your candidate wheel as “Custom.” Watch inner clearance, outer poke, and diameter change. If you plan a donor set, set that vehicle as “Wheels from” and compare.

Confirm bolt seat style with the wheel supplier. Many aftermarket wheels use cone seats. Audi OEM often uses ball seats. Match the seat style to the bolt design. Do not mix seat types.

Spacers are only for solving minor clearance or hub fit issues. If you use them, keep the setup hub-centric and use appropriate extended bolts. Verify bolt length engagement and thread pitch is M14x1.5.

Impact

• Diameter change: Affects speedometer, gearing feel, and ABS tuning.
• Offset change: Moves the wheel in or out, changing clearance and scrub.
• Width change: Increases inner spoke and fender demands. Half the width change affects each side.
• Tire width: More grip, but possible tramlining and hydroplaning risk. Rolling resistance can rise.
• Unsprung mass: Heavier wheels slow steering and braking. Lighter wheels sharpen response.
• Brake clearance: Spoke design matters. Big front brakes need proper barrel and spoke shape.

Risks and gotchas

• Hub bore mismatch: Wheels with a larger bore need 66.6 mm rings for a true hub-centric fit.
• Bolt seat mismatch: Ball vs cone seats must match the wheel. Mixing can loosen hardware.
• Insufficient bolt engagement: Spacer use requires longer M14x1.5 bolts. Verify safe thread engagement.
• Inner interference: Strut, control arm, brake hose, and upright can contact at full lock or compression.
• Outer rub: Fender lip or fender liner can rub on bumps. Check with load and steering input.
• TPMS: Requirements vary by market and production. Confirm sensor type or reset procedure for your car.
• Speedometer error: Large diameter changes can skew readings. Keep changes modest.
• Alignment drift: Any fitment change benefits from a fresh alignment check.

How to use the calculator effectively

• Set “Installed on” to 2010 Audi S4 to load the OEM baseline above.
• If comparing a donor set, select that under “Wheels from.” Review the auto-filled sizes.
• Testing a custom setup: Enter your desired rim width, diameter, and offset under “Custom wheel size.”
• Adjust “Custom tire size” to hold overall diameter near stock. The tool updates diameter as rim changes.
• Review the inner clearance and outer poke results. Aim for safe inner clearance and modest poke.
• Record the percentage diameter change. Keep it small to preserve drivability.

Next actions

Checklist

• Confirm your exact trim, brake package, and suspension height.
• Load the OEM baseline in the calculator and save it.
• Test candidate wheel sizes and offsets. Keep diameter change low.
• Verify 5x112, 66.6 mm hub, and M14x1.5 threads.
• Confirm bolt seat style with the wheel supplier.
• If using spacers, specify hub-centric spacers and matching extended bolts.
• Order needed accessories: hub-centric rings and proper hardware.
• Mount and torque to the OEM spec using a calibrated wrench.
• Road test for rub at full lock and over bumps. Re-torque after a short shakedown.

Helpful tools

• 1/2 inch torque wrench for accurate wheel bolt torque.
• Wheel hanger guide pin M14x1.5 to protect threads and align wheels.
• 66.6 mm hub-centric rings for wheels with a larger center bore.
• Digital caliper to verify ring and hub dimensions.