Wheel, tire, and stance recommendations for BMW G01 - X3, built from Offset Lab fitment presets and factory baseline data.
Popular setup
Front
21x9.5 ET30
255/40R21
Rear
21x10.5 ET38
295/35R21
Factory baseline for X3 M40i: 20x9 ET30 on 245/45R20.
Recommendations
Trim
Factory: 20x9 ET30
245/45R20
5x112 · 66.6mm
Aggressive
Front: 21x10 ET25
Rear: 21x11 ET35
Tires: 265/40R21 / 305/35R21
High
Flush
Front: 21x9.5 ET30
Rear: 21x10.5 ET38
Tires: 255/40R21 / 295/35R21
Medium
OEM+
Front: 20x9 ET30
Rear: 20x9 ET30
Tires: 245/45R20
Low
Trim
Factory: 20x9 ET30
245/45R20
5x112 · 66.6mm
Aggressive
Front: 21x10 ET25
Rear: 21x11 ET35
Tires: 265/40R21 / 305/35R21
High
Flush
Front: 21x9.5 ET30
Rear: 21x10.5 ET38
Tires: 255/40R21 / 295/35R21
Medium
OEM+
Front: 20x9 ET30
Rear: 20x9 ET30
Tires: 245/45R20
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.