WABCO OptiTire System Description page 42

Installation
42
Figure 4
Figure 6
In the case of steel rims the internal
sensor sits flat on the rim.
Figure 8
Correct fit of the internal sensor
Incorrect fit of the internal sensor
Figure 5
Figure 7
In the case of aluminium rims
only the rear section of the wheel
electronics sits on the rim.
Figure 9