2013 Audi S7 Wheel Interchange

2013 Audi S7 Wheel Fitment Guide

Professional, safety-first fitment advice for DIY owners and technicians. Built around the on-page calculator and OEM references. No guessing.

tl;dr

OEM setup for the 2013 Audi S7: 19x8.5 ET32, 5x112, 66.6 mm center bore, M14x1.5 thread, with 255/40R19 tires. Use the calculator to test any width or offset change before you buy. Keep hub bore 66.6 mm or use proper rings. Verify brake and fender clearance. Torque to the spec in your service manual.

Recommendation

I recommend you start from the known OEM baseline, then iterate in the calculator:

• Set “Installed on (your vehicle)” to 2013 Audi S7 using the prefilled OEM numbers below.
• Enter potential “Wheels from (donor vehicle)” or use “Custom wheel size.”
• Keep tire overall diameter close to OEM to preserve speedometer and ABS behavior. A small change is usually fine; confirm in the calculator.
• Watch inner clearance to suspension and outer “poke” to the fender. Aim for a balanced change, not all inboard or all outboard.
• Match hub bore to 66.6 mm or use quality hub-centric rings. Keep thread size M14x1.5, and confirm bolt seat type matches the wheel.

Impact

• Offset: Lower ET pushes the wheel outward, higher ET pulls it inward. This changes fender and strut clearance and steering feel.
• Width: Wider wheels add width half inboard and half outboard unless you adjust offset to compensate.
• Tire size: Larger diameter raises the car and alters gearing and speedo. Smaller does the opposite. The calculator visualizes this.
• Hub match: A true hub-centric fit (66.6 mm) reduces vibration and load on fasteners.
• Brake clearance: Face design and spoke curvature matter as much as specs. Always verify with a test fit or template.

Risks and gotchas

• Seat type mismatch: Many OE Audi bolts use a ball seat; many aftermarket wheels use conical seats. Mixing seats damages wheels. Verify before purchase.
• Spacers without hardware: If you add spacers, ensure hub-centric fit and use appropriately longer M14x1.5 hardware. Recalculate effective offset in the tool.
• Center bore errors: A smaller bore will not fit; a larger bore needs rings to 66.6 mm. Metal rings are more durable than plastic under heat.
• Brake caliper clearance: The S7’s brakes are large. Check spoke-to-caliper clearance, not just barrel diameter.
• Unknown torque: Do not guess fastener torque. Use the value from your Audi service manual and a calibrated torque wrench.
• TPMS and load index: Keep compatible sensors and a tire load index that meets or exceeds OEM. Confirm in the tire specs.

Known OEM fitment for 2013 Audi S7

Approximate OEM tire diameter: about 27.0 in (calculated from 255/40R19). Use the calculator to confirm and compare against any new size.

How to use the calculator on wheelinterchange.com

• Step 1 - Baseline: Select 2013 Audi S7 as “Installed on (your vehicle).” Confirm the prefilled OEM specs match the table above.
• Step 2 - Donor or custom: Enter the donor vehicle wheel, or switch to “Custom wheel size” and set rim diameter, width, and offset.
• Step 3 - Tires: Set “Custom tire size” or let the tool maintain diameter when you change rim size.
• Step 4 - Review changes: Check inner clearance to suspension, outer poke to the fender, and change in tire diameter. Small green or red deltas help you spot issues quickly.
• Step 5 - Brake check: If you’re near limits, plan a physical test fit or use a brake template from the wheel maker.

Checklist before you buy

• Hub bore equals 66.6 mm, or rings included to 66.6 mm.
• M14x1.5 hardware with the correct seat type for your wheel.
• Offset and width verified in the calculator for inner and outer clearance.
• Tire load index and speed rating meet or exceed OEM.
• TPMS compatibility confirmed for your year.

Next actions

1. Measure your current inner and outer clearances where possible. Note any existing rub points.
2. Run your target wheel and tire setup through the calculator and set guardrails: keep overall tire diameter close to OEM and avoid negative inner clearance.
3. Shortlist wheels that are hub-centric to 66.6 mm or accept rings. Confirm seat type and hardware needs.
4. Plan a test fit. Spin the wheel, check caliper and knuckle clearance, and verify fender clearance under load.
5. Tighten using your Audi’s specified torque from the owner’s manual or service information. Re-torque after 50–100 miles.

Helpful tools and parts:

• 1/2 inch torque wrench
• M14x1.5 wheel bolts (match seat type to your wheel)
• 66.6 mm hub-centric rings (choose ring ID to match your wheel’s center bore)