2009 Audi A6 Wheel Interchange

2009 Audi A6 Wheel Fitment Baseline

I steward fitment risk for DIY owners and techs. Let’s start with what is known for the 2009 Audi A6, then work the edge cases. If a value varies by trim or market, I will say so. Use the on-page calculator to confirm changes before you buy.

Some trims and regions may ship with different wheel or tire packages. The door-jamb placard and the owner’s manual are your OEM sources of truth. If a spec is missing or uncertain, use the calculator on this page and match against the placard and VIN-based parts catalog.

Tip: The calculator compares Wheels from a donor vehicle to Installed on your vehicle. Changing rim diameter updates tire diameter in the comparison. Use that to keep total tire diameter in a reasonable window.

Edge cases that trip people up

• Offset creep: Small offset changes can push the inner barrel into the strut or poke the outer lip past the fender. The calculator will show inner clearance change and outer poke. Even a few millimeters can matter with wide tires.
• Center bore mismatch: Aftermarket wheels often have a larger bore. Running them without 57.1 mm hub-centric rings may cause vibration. Rings size from the wheel’s bore down to 57.1 mm.
• Fastener details: The A6 uses M14 x 1.5 bolts. Seat type and bolt length must match the wheel. Mixing seat types or coming up short on thread engagement can loosen under load.
• Brake hardware clearance: Bigger calipers or certain spoke designs may interfere. Barrel diameter and spoke pad depth both matter. A wheel can clear the barrel but still touch the caliper bridge.
• Spacers and adapters: Slip-on spacers may remove the hubcentric lip if too thick. That can shift centering to the bolts. If spacers are needed, hub-centric pieces with proper extended bolts reduce vibration risk.
• Tire diameter drift: Large changes can skew speedometer and stability control behavior. Many techs aim for a small percentage change relative to the baseline, as a mitigation.
• Staggered setups: Wider rears may alter handling balance. Quattro systems can be sensitive to rolling diameter differences. Proceed only if overall diameters match closely.
• TPMS considerations: Some cars use valve-stem sensors. Others use indirect wheel speed. If your car has sensors, confirm compatibility before mounting tires.

How to detect a risky fit before and after install

Before mounting

• Calculator check: Compare donor wheels to your A6. Watch inner clearance and outer poke numbers. Note tire diameter change when you alter rim size.
• Template test: Test-fit one front and one rear without tires. Spin by hand, turn lock to lock, check for any contact points.
• Caliper clearance: Hold a straightedge across the hub face. Measure to the nearest caliper point. Compare against wheel spoke pad height and barrel drop.
• Centering: Confirm wheel bore is at least 57.1 mm. If larger, plan the correct hub-centric rings.
• Fasteners: Verify M14 x 1.5 bolts, matching seat type, and suitable length for any spacers.

After mounting

• Vibration band: Shakes between 50 and 70 mph can point to hub-centric or balance issues.
• Rubbing audit: Full lock in a parking lot, then a slow speed bump test. Listen and inspect the liner and fender lips.
• Tire wear patterns: Fresh feathering or inner shoulder scuffing can signal interference or alignment shift.
• Electronic warnings: Unexpected ABS or stability lights after big diameter changes can happen. Re-check the calculator and tire diameter.
• Heat or odor near a corner: May indicate caliper contact with the barrel or spoke.

Mitigations if you are near the limits

• Use the calculator iteratively: Nudge width and offset until inner clearance shows a small positive margin. Keep outer poke modest relative to the arch.
• Keep total tire diameter close to the baseline: Many aim for a small percentage change. The calculator updates diameter as you edit sizes, which helps.
• Add hub-centric rings: Size them to 57.1 mm on the hub side, and to your wheel’s center bore on the other side. This can reduce mid-speed vibration.
• Select proper bolts: M14 x 1.5, correct seat, and enough shank engagement for any spacer used. Do not mix seat types across corners.
• Choose spacer style carefully: If you must run a spacer, hub-centric styles with matching lip are preferred. Re-check that the wheel still seats fully.
• Confirm brake clearance with clay: A thin layer on the suspect caliper area can show any contact points after a careful hand spin.
• Alignment touch-up: After tire or wheel width changes, a quick alignment check can reduce edge wear and rub events.
• Retorque after the first heat cycle: Recheck bolt torque once the assembly has cooled from its first drive.

Helpful tools and parts:

• Wheel torque wrench
• M14 x 1.5 lug bolts (match seat type)
• Hub-centric rings 57.1 mm
• Tire tread depth gauge

Safe defaults for the 2009 Audi A6

• Stay with 5x112 only. Adapters add complexity and risk in most cases.
• Center bore must seat on 57.1 mm. Use rings if the wheel bore is larger.
• Match M14 x 1.5 bolts and correct seat type. Keep thread engagement healthy.
• If unsure, the OEM baseline of 17x7.5 ET45 with 225/50R17 is a safe default.
• When changing sizes, keep total tire diameter close to stock. The calculator will show the change in real time.
• Avoid spacers unless needed for brake or inner clearance. If used, choose hub-centric and re-verify bolt length.

If your trim differs, confirm against the door placard and the VIN parts catalog. The calculator on this page helps

Select Cars for Wheel Swap

Compare wheel compatibility between two vehicles

Wheels from (donor vehicle)

Make: Select Make

Model: Select Model

Year: Select Year

Selected Car:

Select Wheels: Select Wheels

Custom wheel size (optional)

Rim Diameter: –

Rim Width: –

Wheel Offset: –

Tip: change values here to simulate custom wheels and immediately see the impact in the comparison below.

Custom tire size (optional)

Section Width: –

Aspect Ratio: –

Installed on (your vehicle)

Make: Audi Select Make

Model: A6 Select Model

Year: 2009 Select Year

Selected Car:

Audi A6 2009

Select Wheels: Select Wheels225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0205/60 on 16x7.0225/55 on 16x7.5225/50 on 17x7.5205/60 on 16x7.0225/55 on 16x7.5225/50 on 17x7.5205/60 on 16x7.0225/55 on 16x7.5225/50 on 17x7.5205/60 on 16x7.0225/55 on 16x7.5225/50 on 17x7.5205/60 on 16x7.0225/55 on 16x7.5225/50 on 17x7.5225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5235/50 on 17x7.5245/45 on 17x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0225/50 on 17x7.5245/45 on 17x8.0245/40 on 18x8.0245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0225/55 on 17x7.0235/50 on 17x7.5245/50 on 17x8.0225/55 on 17x7.0235/50 on 17x7.5245/50 on 17x8.0225/55 on 17x7.0235/50 on 17x7.5245/50 on 17x8.0225/55 on 17x7.0235/50 on 17x7.5245/50 on 17x8.0225/55 on 17x7.0235/50 on 17x7.5245/50 on 17x8.0245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/40 on 18x8.0255/35 on 19x8.5245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/35 on 19x8.0245/40 on 18x8.0255/35 on 19x8.5255/30 on 20x9.0245/40 on 18x8.0255/35 on 19x8.5255/30 on 20x9.0245/40 on 18x8.0255/35 on 19x8.5255/30 on 20x9.0245/40 on 18x8.0255/35 on 19x8.5255/30 on 20x9.0245/40 on 18x8.0255/35 on 19x8.5255/30 on 20x9.0 Select Wheels

Compare Rims

Specification

Wheels from

Installed on

Result (Click it)

Bolt Pattern

The total number of bolt holes and the diameter of the circle they form.

-

5x4.41 / 5x112

Center Bore

The hole in the center of the wheel that fits over the vehicle’s hub.

-

57.1mm

Thread Size

The size and spacing of the threads on the bolts or nuts that hold the wheel in place.

-

M14 x 1.5

Rim Diameter

The wheel diameter in inches that determines which tire sizes will fit.

-

17"

Rim Width

The distance between the inner edges of the wheel is measured in inches.

-

7.5"

Wheel Offset

How far the wheel sits inward or outward relative to the hub mounting surface.

-

45mm

Backspacing

Shows how much space the wheel takes up toward the inside of the vehicle.

-

5.52"

Wheel Fasteners

The type of hardware used to secure the wheel to the vehicle.

-

Lug bolts

Compare Tires

Specification

Wheels from

Installed on

Result (Click it)

Section Width

The width of the tire from sidewall to sidewall, measured in millimeters.

-

225 mm

Aspect Ratio

The height of the tire’s sidewall expressed as a percentage of its width.

-

50%

Diameter

The wheel diameter for which the tire is designed to fit.

-

R17

Tire Pressure

The recommended air pressure for safe and efficient driving.

-

2.3 BAR / 33.3 PSI

Overall Diameter

The total height of the tire and wheel combined affects clearance and speedometer accuracy.

-

25.86" (656.8 mm)