1999 Audi A6 Wheel Interchange

1999 Audi A6 Wheel Fitment Guide

Known OEM Fitment For 1999 Audi A6

The specifications below reflect known OEM fitment for the 1999 Audi A6 based on available data. Some trims or regional packages may differ. If your vehicle appears different, confirm using the on-page calculator, your owner manual, the spare wheel, door-jamb tire sticker, or an Audi parts source by VIN.

If any of these values are different on your car, verify with OEM documentation and use the calculator on this page to model changes safely.

How To Use The Wheel Interchange Calculator

• Set Installed on (your vehicle) to 1999 Audi A6.
• For Wheels from (donor vehicle), enter the wheel specs from the wheel listing or the donor car data plate. If you do not know a value, leave it blank or use the Custom wheel size fields.
• Use Custom wheel size to try new rim diameter, width, and offset. The tool shows inner clearance and outer poke differences compared to your OEM baseline.
• Use Custom tire size to enter section width and aspect ratio. When you change rim diameter, the comparison updates tire overall diameter automatically so you can see speedometer and ride-height effects.
• Review three things carefully:
  • Inner clearance to strut, spring perch, and liners.
  • Outer clearance to fender and bumper lips under compression and while steering.
  • Overall tire diameter change. Keep it close to stock to protect ABS, gearing, and speedometer behavior.
• If results are close, plan a physical test fit and a short, careful road check before committing.

Fitment Checklist Before You Buy

• Bolt pattern must be 5x112.
• Center bore must be 57.1 mm on the wheel or larger with proper hub-centric rings to 57.1 mm. Never use a wheel with a bore smaller than 57.1 mm.
• Thread size is M14 x 1.5. Match the lug bolt seat type to the wheel seat type. Do not mix ball-seat and cone-seat hardware.
• Offset and width must clear brakes, suspension, and fenders. Use the calculator to compare inner and outer positions to the OEM 16x7 ET45 baseline.
• Brake caliper clearance must be verified. Use a template from the wheel maker when possible or perform a careful test fit.
• Load and speed ratings for wheels and tires must meet or exceed OEM ratings.
• TPMS: If your vehicle is equipped, ensure sensor compatibility and plan for programming as required. Some 1999 vehicles may not have TPMS.
• Spacers: If required for clearance, use hub-centric spacers that match 57.1 mm. Ensure proper thread engagement on lug bolts. Longer bolts are required when spacers are installed.
• Never rely on the bolts to center the wheel. The wheel must seat on the hub or on a correct hub-centric ring.

Plus Sizing And Common Upgrades

Many owners consider plus sizing for improved appearance and handling. Typical approaches are plus one or plus two diameter steps with a lower-profile tire that keeps overall diameter close to stock. Because offsets, widths, and brake clearances vary by wheel design and by trim, do not assume a size will fit without verification.

• Use the calculator to model a plus one or plus two change, then adjust tire aspect ratio until the overall diameter is close to the OEM 205/55R16 baseline.
• Watch inner clearance first when increasing width. If you add width to the outside, confirm fender clearance at full steering lock and over bumps.
• Heavier wheels and tires can affect acceleration, braking, and ride quality. Choose lighter options when possible and verify load ratings.

If you are unsure whether your trim can accept a larger wheel, confirm with an Audi parts source by VIN and perform a test fit.

Installation Tips

• Work on a cool vehicle. Park on level ground, apply the parking brake, and chock the opposite wheels.
• Lift using proper jacking points and support the car with jack stands. Never rely on a jack alone.
• Clean the hub face and the wheel mounting pad. Remove rust and debris with a wire brush for true mounting.
• If using hub-centric rings, seat them fully on the wheel and verify the ring ID is 57.1 mm.
• Hand-thread M14 x 1.5 lug bolts to avoid cross-threading. Use the correct seat type for your wheels.
• Tighten in a star pattern and torque to the specification in your owner manual or service information.
• Re-torque after 50 to 100 miles of driving.
• Before road use, turn the steering from lock to lock and compress the suspension to check for any contact.

Tools And Helpful Supplies

• 1/2 inch click torque wrench
• Wheel hanger guide pin M14x1.5
• Hub-centric rings 57.1 mm ID
• Digital tire tread depth gauge

Also have a floor jack, jack stands, breaker bar, appropriate socket for your lug bolts, wire brush, and mild anti-seize for the hub center if permitted by your service manual. Do not apply lubricants to lug bolt threads unless the OEM procedure specifies it.

FAQs

• Can I use 5x112 wheels from a different vehicle on my 1999 Audi A6?

  Possibly, but you must match bolt pattern, ensure the wheel center bore is 57.1 mm or larger with rings, verify offset and width in the calculator, and confirm brake clearance. Always test fit and verify load rating.

• Do I need hub-centric rings?

  Use rings if the wheel center bore is larger than 57.1 mm. Rings adapt the wheel to the hub for a vibration-free fit. If the wheel bore is exactly 57.1 mm, rings are not needed. A smaller bore will not fit.

• What lug bolts should I use?

  The thread is M14 x 1.5. The seat type must match the wheel seat type, and the effective bolt length must accommodate wheel and spacer thickness. When in doubt, consult the wheel manufacturer and your service manual. Do not mix ball-seat and cone-seat hardware.

• What offset works with wider wheels?

  The OEM reference is ET45 on a 16x7 wheel. Use the calculator to see how changes in width and offset affect inner clearance and outer poke. Choose a setup that clears brakes and suspension while keeping the tire inside the fender under load.

• Will larger diameter wheels affect my speedometer?

  Yes if overall tire diameter changes. Use the tire section of the calculator to match overall diameter closely to the OEM 205/55R16 baseline to keep speedometer and ABS behavior consistent.

• Can I run spacers to clear suspension or brakes?

  Yes, if you use quality hub-centric spacers that match the 57.1 mm hub and ensure proper thread engagement with longer M14 x 1.5 bolts. Recheck wheel balance and torque. Verify fender clearance after spacing the wheel outward.

• How do backspacing and offset relate?

  Offset is the distance from the wheel centerline to the mounting face. Backspacing is the distance from the inner wheel lip to the mounting face. For the OEM 16x7 ET45, backspacing is approximately 5.27 in as listed. Changing width or offset changes both inner and outer positions. The calculator displays these movements clearly.