Adjustment Of The Front Derailleur - Shimano Ultegra ST-6870 Dealer's Manual

ADJUSTMENT

Adjustment of the front derailleur

Adjustment of the top-side stopper bolt
Adjust the stopper bolt with an Allen
key.
Shift the rear derailleur to the smallest
sprocket, and then tighten the top-side
stopper adjustment bolt until it touches
the stopper at the position where the
rear derailleur finally stopped. From this
position, turn the top adjustment bolt
counterclockwise one turn so that an
over-stroke allowance can always be
maintained.
8
By shifting from a largest sprocket to a
smallest sprocket, the rear derailleur will
move toward the outside by the
over-stroke allowance and then move
back.
„ Adjustment of the front derailleur
Low adjustment
Set the chain onto the smallest chainring
and the largest sprocket.
1
To be continued on next page
(J)
(A)
(B)
(C)
(D) (E)
55
(J)
Top-side stopper adjustment
bolt
(A)
Low adjustment bolt
(B)
Support bolt
(C)
Top adjustment bolt
CAUTION
The low adjustment bolt, the top adjustment
bolt and the support bolt are close to each
other.
Make sure that you are using the correct bolt
for adjustment.
(D)
Largest sprocket
(E)
Smallest chainring