Opel 2016 ASTRA Owner's Manual page 72

70 Storage
Remove the pedal crank mounts from
the pedal crank recesses.
Adapting the rear carrier system to a
bicycle
Press the release lever and withdraw
the wheel recesses.
Push the release lever on the strap
retainer and remove the strap
retainer.
Prepare the bicycle for attachment
Note
The maximum width for the pedal
crank is 38.3 mm and the maximum
depth is 14.4 mm.
Rotate the left pedal (without a chain
cog) vertically downwards. The pedal
on the left pedal crank must be
horizontal.
The front bicycle must have its front
wheel facing left.
The rear bicycle must have its front
wheel facing right.
Attaching a bicycle to the rear carrier
system