Offset Lab
Fitment

Audi B9 - A4/S4/S5/RS5 Fitment Guide

Wheel, tire, and stance recommendations for Audi B9 - A4/S4/S5/RS5, built from Offset Lab fitment presets and factory baseline data.

Popular setup

Flush fitment

Front

19x9.5 +35

255/35R19

Rear

19x9.5 +35

255/35R19

Factory baseline for A4: 19x8.5 +35 on 245/35R19.

Recommendations

Trims and setup styles

Open fitment tool

Trim

A4

Factory: 19x8.5 +35

245/35R19

5x112 · 66.6mm

Aggressive

Front: 20x10 +30

Rear: 20x10 +30

Tires: 275/30R20

Moderate

Flush

Front: 19x9.5 +35

Rear: 19x9.5 +35

Tires: 255/35R19

Low / Moderate

OEM+

Front: 19x8.5 +35

Rear: 19x8.5 +35

Tires: 245/35R19

Low

Trim

RS5

Factory: 20x9 ET26

275/30R20 front / 275/30R20 rear

5x112 · 66.6mm

Aggressive

Front: 20x10.5 +22

Rear: 20x10.5 +22

Tires: 295/30R20

Moderate

Flush

Front: 20x10 +25

Rear: 20x10 +25

Tires: 285/30R20

Low / Moderate

OEM+

Front: 20x9 +26

Rear: 20x9 +26

Tires: 275/30R20

Low

Trim

S4

Factory: 19x8.5 +35

245/35R19

5x112 · 66.6mm

Aggressive

Front: 20x10 +28

Rear: 20x10 +28

Tires: 275/30R20

Moderate

Flush

Front: 19x9.5 +35

Rear: 19x9.5 +35

Tires: 255/35R19

Low / Moderate

OEM+

Front: 19x8.5 +35

Rear: 19x8.5 +35

Tires: 245/35R19

Low

Trim

S5

Factory: 20x9 +32

255/30R20

5x112 · 66.6mm

Aggressive

Front: 20x10 +25

Rear: 20x10 +25

Tires: 275/30R20

Moderate

Flush

Front: 20x9.5 +30

Rear: 20x9.5 +30

Tires: 265/30R20

Low / Moderate

OEM+

Front: 20x9 +32

Rear: 20x9 +32

Tires: 255/30R20

Low

Fitment note

Final fitment depends on tire model, alignment, suspension height, brake clearance, body tolerance, and intended use. Test fit before committing to permanent changes.