FRENES

Wheels from Audi Q7 on Audi S4: compatible?

Yes, with hub centric rings

Same 5x112 PCD, but the centre bore of the wheels from Audi Q7 (71.6 mm) is larger than the hub of Audi S4 (66.5 mm): you need 4 hub centric rings 71.6 → 66.5.

Rings 71.6 → 66.5

Audi Q72005–2015Audi S41991–1994
PCD5x130 / 5x1125x112
Centre bore71.6 mm66.5 mm
ThreadM14x1.50M14x1.50
Original wheels 7.5Jx18 ET53
≈7.5Jx18 ET31		 R
R
R
≈6Jx15 ET40
≈7.5Jx18 ET40

≈: width estimated from the original tyre size.

Wheel by wheel: offset and tyres

Each original wheel from Audi Q7 is compared with the one from Audi S4 of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.

  • 7.5Jx18 ET53 · 235/60R18 — Check on the car

    Compared with the original ≈7.5Jx18 ET40 on Audi S4: shock absorber side +13 mm, wheel arch side −13 mm, tyre diameter +13.2 % : fit it with the original tyre size of Audi S4 (245/40R18), not that of Audi Q7. Comparison for guidance only (estimated width). Check in detail

  • ≈7.5Jx18 ET31 · 235/65R18 — Check on the car

    Compared with the original ≈7.5Jx18 ET40 on Audi S4: shock absorber side −9 mm, wheel arch side +9 mm, tyre diameter +16.8 % : fit it with the original tyre size of Audi S4 (245/40R18), not that of Audi Q7. Comparison for guidance only (estimated width). Check in detail

Before fitting the wheels

An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Audi S4 (M14x1.50), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.

And the other way round: wheels from Audi S4 on Audi Q7?