BMW GRAN COUPE 4 Series Owner's Manual page 222

Mobility
Tire size
Front: 225/40 R 19
89 Y RSC
Rear: 255/35 R 19
92 Y RSC
Front: 225/35 R 20
90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC
Emergency wheel:
T 135/80 R 17 102
M
With high-speed tuning feature
Tire size
Specifications in
bar/PSI with cold
tires
225/50 R 17 94 H
M+S RSC
225/45 R 18 91 Y
RSC
225/45 R 18 95 V
M+S XL RSC
Front:
225/45 R 18 91 Y
RSC
Rear: 255/40 R 18
95 Y RSC
Front: 225/45 ZR
18 95 Y XL Std
Rear: 255/40 ZR
18 99 Y XL Std
222
Wheels and tires
Pressure specifications
in bar/PSI
2.8 / 41 -
- 2.9 / 42
2.8 / 41 -
- 3.3 / 48
Speed up to a max. of
50 mph / 80 km/h
4.2 / 60
Pressure specifications
in bar/PSI
2.7 / 39 3.2 / 46
2.8 / 41 3.3 / 48
2.8 / 41 -
- 2.9 / 42
2.8 / 41 -
- 2.9 / 42
Online Edition for Part no. 01402978272 - II/17
Tire size
Front:
225/40 R 19 89 Y
RSC
Rear: 255/35 R 19
92 Y RSC
Front: 225/35
R 20 90 Y XL RSC
Rear: 255/30 R 20
92 Y XL RSC
Emergency
wheel:
T 135/80 R 17
102 M
Tire identification marks
Tire size
245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
R: radial tire code
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
Maximum tire load
Maximum tire load is the maximum permissible
weight for which the tire is approved.
Locate the maximum tire load on the tire side‐
wall and the Gross Axle Weight Rating – GAWR
– on the certification label on the driver's door
pillar.
Divide the tire load by 1.1. It must be greater
than one-half of the vehicle's Gross Axle
Weight Rating – GAWR. Note, front vs. rear
GAWR and tire loads, respectively.
Pressure specifications
in bar/PSI
2.8 / 41 -
- 2.9 / 42
2.9 / 42 -
- 3.4 / 49
Speed up to a max. of
50 mph / 80 km/h
4.2 / 60