Replacing Chainrings - Shimano DURA-ACE FC-R9100 Dealer's Manual

MAINTENANCE

Replacing chainrings

MAINTENANCE
„ Replacing chainrings
• Gear shifting performance will be reduced if the installation positions of the chainrings are incorrect. Be sure to install the chainrings in the
correct positions.
• Use the correct combination of genuine Shimano bolts, chainrings and crank arm, otherwise the large chainring may become damaged by the
bolts.
Outer side
With the marked side of the largest chainring facing outward, set the largest chainring so
that the chain drop prevention pin is positioned under the crank arm.
(A)
(C)
Inner side
With the marked side of the smallest chainring facing inward, set the smallest chainring so
that the Δ mark or the convex section is positioned under the crank arm.
FC-R9100
(A)
(C) (D)
(B)
NOTE
(B)
FC-R8000/FC-R7000
(B)
20
(A)
Marking
(B)
Crank arm
(C)
Chain drop prevention pin
(A)
Marking
(B)
Crank arm
(C)
Δ mark
(D)
Convex section
Tightening torque
12 - 16 N·m