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BMW X4 M tyre sizes

All factory fitments by generation and engine — 10 sizes across 2 generations.
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Quick answer

The most common tyre size on the BMW X4 M is 245/40R21 (overall diameter ≈ 729 mm). Exact fitment depends on generation and engine — full breakdown below.

X4 M (F34XM (G02)/Facelift) 2021 - SUV (2021–present)

EngineTyre sizes
X4 M40d - 340 PS - Mild-Hybrid - 2993 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 M40i - 360 PS - Mild-Hybrid - 2998 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20

X4 M (F34XM (G02)) 2018 - 2021 - SUV (2018–2021)

EngineTyre sizes
X4 M Competition xDrive - 510 PS - Petrol - 2993 Hubraum255/40R21 255/45R20 265/40R21 265/45R20
X4 M xDrive - 480 PS - Petrol - 2993 Hubraum255/40R21 255/45R20 265/40R21 265/45R20
X4 M40d xDrive - 326 PS - Diesel - 2993 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 M40d xDrive - 340 PS - Mild-Hybrid - 2993 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 M40i - 360 PS - Mild-Hybrid - 2998 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 M40i - 360 PS - Petrol - 2998 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 M40i xDrive - 354 PS - Petrol - 2998 Hubraum245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 xDrive30d (Mild-Hybrid) - 249 PS - hybrid - 2993 Hubraum225/60R18 245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
X4 xDrive30d (Mild-Hybrid) - 286 PS - hybrid - 2993 Hubraum225/60R18 245/40R21 245/45R20 245/50R19 275/35R21 275/40R20
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Related: all cars using 245/40R21 · all vehicles