Shimano SORA FC-R3000 Dealer's Manual page 17

MAINTENANCE
Replacing chainrings
FC-R3000-CG
1
2
(y)
(z)
(B)
(A)
With the marked side of the smallest
chainring facing inward, set the smallest
chainring so that the alignment tab is
positioned under the crank arm.
(A)
(B)
(y)
4 mm hexagon wrench
(z)
5 mm hexagon wrench
17
(A)
Crank arm
(B)
Chain guard
Tightening torque
1.5 - 2.5 N·m
12 - 14 N·m
(A)
Crank arm
(B)
Alignment tab