2021 BMW Z4 tire sizes
The 2021 BMW Z4 came from the factory with 2 tire sizes on 18" wheels. The most common size is 255/40 R18. Some setups are staggered, with wider tires at the rear. Pick your trim below.
2021 Z4 M40i
Factory (OE) sizes
18"wheels
Front255/40 R18Rear275/40 R18
Optional sizes
19"wheels
Front255/35 R19Rear275/35 R19
2021 Z4 sDrive30i
Factory (OE) sizes
18"wheels
Front255/40 R18Rear275/40 R18
Optional sizes
19"wheels
Front255/35 R19Rear275/35 R19
How to read 255/40 R18
- 255
- Tread width in millimetres
- 40
- Sidewall height, % of width
- R
- Radial construction
- 18
- Wheel diameter in inches
Overall diameter: about 26.0" · Sidewall: 102 mm
BMW Z4 tire sizes by year
Other BMW models
1-Series
128i
135i
135is
1600
2002
228i
230i
3.0Si
318i
318ic
318is
318ti
320i
323Ci
323i
323ic
323is
323iT
325
325Ci
325e
325es
325i
325ic
325is
325iT
325ix
325xi
325xiT
328Ci
328d
328i
328ic
328is
328xi
330Ci
330e
330i
330xi
335d
335i
335is
335xi
340i
428i
430i
435i
440i
525i
525td
525xi
528e
528i
528xi
530e
530i
530xi
535d
535i
535xi
540d
540i
540iA
540iT
545i
550e
550i
630Csi
633Csi
640i
645Ci
650i
733i
735i
735iL
740e
740i
740iL
740Li
745e
745i
745Li
750e
750i
750iL
750Li
760i
760Li
840ci
840i
850ci
850csi
850i
Active Hybrid
Alpina B6
Alpina B7
Alpina B7 xDrive
Alpina B7L
Alpina B7L xDrive
Alpina B8 Grand Coupe
Alpina XB7
Bavaria
BMWCCA
i3
i4
i5
i7
i8
iX
L6
L7
M
M2
M235i
M240i
M3
M340i
M4
M440i
M5
M550i
M6
M760i
M8
M850i
X1
X2
X3
X4
X5
X6
X7
XM
Z3
Z8