Tire size
Example: 255/55 R 19 107 V
255: nominal width in mm
55: aspect ratio in %
R: radial tire code
19: rim diameter in inches
107: load rating, not for ZR tires
V: speed rating, before the R on ZR tires
Speed letter
Q = up to 100 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
See also:
System limits
Speed range
Best results are achieved when using the system
on well-developed roads and highways.
The desired speed can be selected between
20 mph/30 km/h and 110 mph/180 km/h.
The system can a ...
Controls
Controls at a glance
1. Control Display
2. Controller with buttons
The buttons can be used to open the menus
directly. The controller can be used to select
menu items and create the settings. ...
Tire inflation pressure values over100 mph/160 km/h
X3 28i
X3 35i
...