WABCO OptiTire System Description page 56

Installation
Semitrailer: Assembly at cross member
d1 Half distance between two axles
d2 Half distance between two sensors
r Signal radius of a sensor
x
Distance from the centre of the cross member to the centre of the axle
---
Signal range of a sensor
Optimum mounting position of the ECU
56
Driving direction
d1 d1
LEGEND
d2
d2
X
X
min
max