La Sportiva Stratos V Owner's Manual page 16

CUSTOMIZING INSTRUCTIONS
the rear adjuster pin A
1. Cuff Inclination: allows the angle of the
cuff to be changed to 2 positions (10° 5°): act on the spring B
to remove the pin A, position the skiwalk hook C in the desired
position, reposition the pin and reset the spring.
If more advanced adjustment is required, place the optional
bearing cushion D on the padding E.
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