2018 Audi SQ5 Wheel Interchange

2018 Audi SQ5 Wheel Fitment Guide

This page focuses on safe, accurate wheel and tire fitment for the 2018 Audi SQ5. Some OEM measurements vary by trim or package. If a value is not listed here, do not assume it. Confirm against your driver door placard, owner’s manual, and the on-page calculator.

Known OEM Fitment Details

The following specifications are confirmed for at least one factory configuration of the 2018 Audi SQ5. Values not shown may differ by package. Verify what your specific vehicle came with before purchasing parts.

Note: The 19 inch rim and the 255/45R20 tire indicate different factory packages. Your SQ5 may have come with a different size. Always check your door placard for the as-delivered tire size and load index.

How to Use the Wheel Interchange Calculator

• Set Wheels from to the donor vehicle you are considering or select Custom wheel size to enter exact rim width, diameter, and offset. You can also set a Custom tire size.
• Set Installed on to 2018 Audi SQ5.
• Review the comparison for inner clearance to suspension and brakes, outer poke toward the fender, and overall tire diameter change. The tool shows how much the wheel moves in or out compared to your baseline.
• Changing rim diameter updates the compared tire diameter in the tool so you can see ride height and speedometer impact.
• Keep overall tire diameter as close to OEM as practical. Many installers aim for within about 2 to 3 percent to protect ABS, AWD, and gearing behavior.

Fitment Checklist Before You Buy

• Bolt pattern: The wheel must be 5x112.
• Center bore: The hub is 66.5 mm. Aftermarket wheels must have a center bore that is 66.5 mm or larger. If larger, use hub-centric rings to step down to 66.5 mm. If smaller, the wheel will not seat.
• Threads and hardware: The car uses M14 x 1.5 wheel bolts. Bolt seat style can vary by wheel brand. Audi OE wheels typically use a ball seat, but do not assume. Confirm the seat type required by your wheels and match it with the correct bolts. If you add spacers you must use appropriately longer bolts with the correct seat.
• Offset and width:
  • Lower ET number pushes the wheel outward. Higher ET pulls it inward.
  • Wider wheels expand roughly half the added width inward and half outward relative to the mounting face. Use the calculator to visualize inner and outer changes.
  • Check inner clearance to struts, control arms, brake lines, and splash shields. Check outer clearance to fenders and liners under compression and steering.
• Backspacing: Compare the listed backspacing of a donor wheel to your baseline. More backspacing can risk inner interference. Use the calculator to see the change inboard.
• Brake clearance: High performance front calipers on the SQ5 can limit smaller diameters and certain spoke designs. Minimum safe wheel diameter for your brakes is not listed here. Verify with a physical test fit or the wheel maker’s brake template.
• Tires: Match or exceed the OEM load index and speed rating shown on your door placard. Ensure sufficient clearance at full lock and over bumps. The calculator helps visualize diameter changes, but a physical test fit is the final check.
• TPMS: TPMS style can vary by market and equipment. Check your owner’s manual or dealer. If your vehicle uses direct sensors, you will need compatible sensors for additional wheel sets. If it uses indirect monitoring, follow the reset procedure after changes.
• Spacers: Use only hub-centric spacers that maintain a 66.5 mm hub interface. Ensure the hub lip still fully engages the wheel and that you have proper thread engagement with longer bolts as required.

Confirming Unknown or Varying Specs

• Door placard: Confirms factory tire size, load index, and recommended pressures for your exact VIN.
• Owner’s manual: Confirms wheel bolt torque, jacking points, and other service notes.
• OEM parts counter or wheel manufacturer: Confirms bolt seat style, minimum diameter for brake clearance, and any model year changes.
• On-page calculator: Model any donor wheel and tire against your SQ5 to quantify inner clearance, outer poke, and diameter change before you buy.

Installation and Safety Tips

• Clean the hub face and the wheel mounting pad. Do not lubricate wheel bolt threads or seats unless explicitly specified by Audi.
• Hand start all bolts and snug in a star pattern. Torque to the factory spec from your owner’s manual using a calibrated torque wrench.
• Re-torque after 50 to 100 miles of driving on new wheels or spacers.
• If vibrations occur, confirm hub-centric fit, wheel balance, and that bolts match the correct seat style.

Helpful Tools

• Methodology and sources

  Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:

  • Bolt pattern / PCD
  • Center bore direction (donor wheel bore must not be smaller than the hub)
  • Wheel diameter, width, and offset against known OEM ranges
  • Lug thread / hardware differences (vehicle-side hardware)

  A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.