Shimano GRX RX 815 Series Dealer's Manual page 97

INSTALLATION/REMOVAL
Securing the front derailleur
2.
Adjust the installation angle and secure the front derailleur.
(1) Perform adjustment so that the flat surface of the chain guide outer plate is in a
position directly above the largest chainring and that the rear edge of the chain
guide is inwards by 0.5 to 1 mm compared to the front edge.
(2) Secure the front derailleur with a mounting bolt or clamp bolt.
With mounting boss (direct mount)
(2)
Chain guide
NOTICE
• With a carbon frame, even the recommended tightening torque may be too
tight and cause damage to the frame, or too loose and not sufficiently attached
to the frame. For information on the appropriate torque value, consult with the
manufacturer of the completed bicycle.
Mounting bolt
5 - 7 N·m
Largest chainring
(1) 0.5 - 1 mm
Without mounting boss (use band adapter)
(2) Clamp bolt
5 - 7 N·m
Chain guide
97
Largest
chainring
(1) 0.5 - 1 mm