2015 Audi A3 Wheel Fitment, Bolt Pattern, Offset, and Tire Size

tl;dr

The 2015 Audi A3 baseline on this page uses a 5x112 bolt pattern, 57.1 mm center bore, and M14 x 1.5 wheel bolts. The reference wheel is 17x7.5 ET43 with 5.44 in backspacing, paired with 225/45R17 tires. Use the on-page calculator to compare any donor wheel to your A3, adjust width and offset, and confirm clearance before buying.

Some equipment can vary by trim or package. If your sticker, manual, or wheel face shows different numbers, use those as your baseline in the calculator.

Recommendation

I recommend you start from the OEM baseline above, then use the calculator to keep inner clearance safe and outer poke controlled as you change width or diameter.

• Pattern and hub: 5x112 only. Hub bore must seat to 57.1 mm. Use hub-centric rings if the wheel bore is larger.
• Bolts: M14 x 1.5. Match bolt length and seat type to the wheel design. Do not mix seat profiles.
• Offset targeting: When changing width, offset usually changes by about half the width delta to maintain inner clearance. Example: 7.5 to 8.5 in adds 25.4 mm total, so reduce offset roughly 12.7 mm. ET43 becomes near ET30. Always verify poke and fender clearance in the calculator.
• Tire diameter: Keep overall diameter close to stock. A target within about 2 percent is a practical limit for speedometer and ride. The calculator will update tire diameter when you change rim diameter.
• Spacers: Only if needed for inner barrel or spoke-to-caliper clearance. Use hub-centric spacers sized to 57.1 mm with appropriately longer M14 x 1.5 bolts.

Impact

• Handling and feel: Wider wheels can increase grip but will track ruts more. Higher offset moves weight inboard and can load suspension differently.
• Ride quality: Larger diameter wheels with shorter sidewalls ride firmer and transmit more impact.
• Speedometer and gearing: Bigger overall tire diameter reads slower. Smaller reads faster.
• Brakes and clearance: Spoke shape and barrel depth affect caliper clearance. Offset alone is not the full picture.
• Bearings and wear: Large scrub changes or heavy wheels can increase bearing and bushing wear over time.

Risks

• Center bore mismatch. If the wheel is not centered on 57.1 mm, vibration is likely.
• Wrong bolt seat. Many aftermarket wheels use cone seats. Some OE styles use ball seats. Match the wheel’s seat type.
• Insufficient thread engagement. Bolts must seat fully. Spacer use requires longer bolts of the same grade.
• Inner rub on strut, spring perch, or liner. Check inner clearance in the calculator and on the car.
• Outer poke and fender contact. Consider bump travel and steering lock, not static gap only.
• TPMS differences. The system type can vary by market or trim. Check your owner’s info and cluster reset menu.
• Brake caliper and spoke interference. Some designs clear by millimeters. Always test fit.

Next actions

Checklist

• Confirm your current wheel size, offset, and tire size from the wheel stamp and sidewall.
• Open the calculator on wheelinterchange.com for the 2015 Audi A3 page.
• Set “Installed on” to your A3 and enter your exact baseline if it differs.
• Enter donor wheel specs or use “Custom wheel size” and “Custom tire size.”
• Watch inner clearance, outer poke, and overall tire diameter deltas.
• If using spacers, add spacer thickness to offset math and recheck bolt length.

Fitment targets

• Inner clearance: Aim to keep stock or add a few millimeters. The calculator will show the change.
• Outer position: Avoid excessive poke beyond the fender line. Leave margin for compression.
• Overall diameter: Keep close to stock. Use the calculator’s diameter output to confirm.

Install steps

• Test fit one corner. Spin the wheel by hand and check caliper and liner clearance.
• Verify the hub seats flush and the bolt seats match the wheel.
• Torque in a star pattern to the spec in your owner’s manual.
• Road test gently. Listen and feel for vibration or rubbing.
• Re-torque after 50 to 100 miles. Recheck clearances under load and at full lock.
• Schedule an alignment if you changed diameter or tire type.

Gotchas

• Backspacing is tied to width and offset. Do not compare offsets alone across widths.
• Winter setups may need more inner clearance due to snow buildup in liners.
• Do not stack spacers. Use a single hub-centric spacer per hub if required.
• If vibration appears after install, check hub rings first, then wheel balance.

Helpful tools

• 1/2 inch drive torque wrench
• M14 x 1.5 wheel bolts (match seat type and length)
• Hub-centric rings 57.1 mm

If any spec on your vehicle differs from the baseline here, use that value in the calculator and confirm against your owner’s manual or an OEM parts database. When in doubt, test fit before mounting tires.