2012 Audi S5 Wheel Interchange

2012 Audi S5 Wheel Interchange and Fitment Guide

You want compatible wheels without clearance or safety surprises. This page walks you from baseline specs to a validated fit using the WheelInterchange.com calculator. I will call out common trade-offs and where you need confirmation from OEM sources.

Goal

Identify wheel and tire sizes that safely fit a 2012 Audi S5 under real-world constraints, using known OEM data, the on-page calculator, and validation checks before you buy or install.

Prerequisites

• Access to the on-page fitment calculator on wheelinterchange.com.
• Your 2012 S5’s tire placard (driver door jamb) or owner’s manual for factory sizes and torque spec.
• Basic tools for inspection and test fit. A torque wrench helps ensure proper clamp load. Example search: torque wrench.
• If you plan to adapt wheels, you may need hub-centric rings sized to 66.6 mm hub. Example search: 66.6 hub-centric rings.
• Correct fasteners. The S5 uses M14 x 1.5 hardware. Example search: M14 x 1.5 lug bolts.

Known OEM Fitment for 2012 Audi S5

These values are observed entries on this page. Trims and packages may vary. If a value on your car differs, use your placard and the calculator as the source of truth.

Note the apparent conflict: a 20x9 ET29 wheel is listed alongside a 245/40R18 tire. This suggests multiple factory or common sizes exist. Do not assume both apply to your trim at the same time. Confirm your baseline with the door placard and then use the calculator.

Step by step

1) Establish your baseline

• Read your tire placard for the factory wheel and tire size that shipped with your S5.
• Record bolt pattern 5x112, center bore 66.6 mm, and thread M14 x 1.5 from above. These are consistent across B8 S5 variants, but verify if your car has aftermarket hubs or studs.

2) Set up the calculator

• Installed on (your vehicle): select 2012 Audi S5.
• If comparing a donor vehicle, choose it under Wheels from (donor vehicle). If not, leave donor blank and use Custom wheel size.

3) Enter your current setup

• In Custom wheel size, input your baseline wheel width, diameter, and offset. If your placard shows 18-inch tires, enter the corresponding wheel size, or match the known 20x9 ET29 only if your car actually has that setup.
• In Custom tire size, enter your actual tire size from the sidewall. The calculator updates overall diameter as you change rim diameter and tire profile.

4) Explore your target setup

• Adjust Custom wheel size to the wheel you want to run. Keep bolt pattern 5x112 and center bore 66.6 mm in mind. If the new wheel bore is larger, plan for hub-centric rings. If smaller, machining is the only option, not recommended for most users.
• Adjust offset to tune inner clearance and outer “poke.” Lower ET moves the wheel outward, higher ET inward. Watch the calculator’s clearance numbers relative to strut and fender.
• Set Custom tire size for the new wheel. Keep overall diameter close to factory to protect ABS and speedometer accuracy. The calculator shows diameter and speed error for validation.

5) Interpret the comparison

• Inner clearance change: positive means more space to suspension, negative reduces space. Aim to avoid negative values that approach zero clearance.
• Outer position change: positive means the wheel sticks out farther. Check fender lip and liner.
• Overall tire diameter: keep variance within a small margin from OEM. The calculator displays percent change and speedometer effect.
• Backspacing: compare with the listed 5.64 in example to understand how far the wheel sits inboard. Large increases risk rubbing on control arms or liners.

6) Hardware and installation planning

• Fasteners: stay with M14 x 1.5 and correct seat type (Audi typically uses ball seat). Length must suit the wheel and any spacers. If in doubt, measure shank engagement and follow OEM guidance.
• Hub-centric rings: if the wheel bore exceeds 66.6 mm, use rings sized to your wheel’s bore to avoid vibration.
• Spacers: only if needed to clear calipers or struts. Use hub-centric spacers that match 66.6 mm hub and 5x112 pattern. Example search: 5x112 66.6 spacers.
• Torque: tighten to the factory torque spec listed in your owner’s manual using a calibrated torque wrench.

Validation

• Static clearance: with the car on the ground, check finger clearance to struts, control arms, and fender lips.
• Lock-to-lock: turn the steering fully both ways and inspect liner and brake hose clearance.
• Compression check: jack one front corner to compress the suspension and recheck clearances.
• Road test: verify no rubbing over bumps, no vibration at highway speed, and normal steering feel.
• Speedometer check: compare GPS speed to the dash. The calculator shows expected error. They should align within your calculated margin.
• Re-torque: after 50–100 miles, recheck fastener torque.

Troubleshooting

• Vibration at speed: likely non hub-centric fit. Install proper 66.6 mm hub-centric rings and re-torque in a star pattern.
• Fender rub on bumps: tire diameter or offset is too aggressive. Reduce tire section width or aspect ratio, or choose a higher ET. Use the calculator to quantify how much change is needed.
• Inner rub on suspension: add a small spacer or move to a lower ET wheel. Confirm that thread engagement and hubcentric support remain within manufacturer recommendations.
• Brake caliper contact: check spoke profile and barrel diameter. Sometimes 1–3 mm additional spacer clearance solves it, but validate hub engagement before proceeding.
• TPMS warning: ensure sensors are compatible and correctly programmed or transferred from your original wheels.
• Steering pull after install: get an alignment. Wheel and tire changes can shift camber and toe slightly.

Wrap up

The 2012 Audi S5 accepts a range of wheels, but trim differences matter. This page lists core specs like 5x112, 66.6 mm hub, and M14 x 1.5 threads, plus example wheel and tire sizes that appear on this model year. Because factory sizes vary, confirm your baseline from the placard, then model changes with the calculator before purchase. Validate with a careful test fit and torque to the OEM spec. With those steps, you can choose wheels confidently and avoid fitment surprises.