Shimano BB-R9100 Dealer's Manual - Page 20
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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.
• Make sure to use the correct combination of SHIMANO genuine parts, otherwise the cranks or chainrings may become damaged.
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 alignment tab is positioned under the crank arm.
FC-R9100
(A)
(C)
(D)
(B)
NOTICE
(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)
Alignment tab
Tightening torque
12 - 16 N·m