Shimano Ultegra R8050 Series Dealer's Manual page 142

ADJUSTMENT
Adjustment of the front derailleur
[X]
(B)
3
[Y]
SM-EW90-A/B
4
EW-RS910
Operate shifting switch [X] or [Y].
Adjust so that there is a clearance of 0 –
0.5 mm between the chain and the chain
guide inner plate.
[Y]
[A-B]
(A)
[X]
[A-B]
Press the button at junction A until the
red LED turns off in order to switch from
rear derailleur adjustment mode to gear
shifting mode.
(A)
0 – 0.5 mm
142
(A)
Chain
(B)
Chain guide inner plate
NOTE
Shift the front derailleur and the rear
derailleur to all gears to make sure that the
chain does not contact the chain guide.
TECH TIPS
•
The adjustable range is 25 steps.
(12 steps inward and 12 steps outward
from the initial position)
•
When adjusting, the chain guide will
overrun slightly and then move back in an
exaggerated manner to help in verifying
the adjustment direction.
Make sure to check the positions of the
chain guide and the chain when the chain
guide has come to a stop.
(A)
Button