Shimano GRX RD-RX812 Dealer's Manual - Page 20

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Shimano GRX RD-RX812 Dealer's Manual
Adjustment

SIS adjustment

3.
Check that the chain has running clearance when it is in the smallest
rear sprocket.
If the chainstay and rear derailleur interfere, adjust by turning the B-screw until they do
not interfere.
If there is some slack in the chain, adjust the B-screw to remove the slack from the chain.
SIS adjustment
1.
Set the switch lever in the OFF position.
2.
Operate the shifting lever once to shift to the 2nd sprocket counting
from the smallest sprocket.
3.
Shift to the 2nd from the smallest sprocket. If using a 2x system, also
shift to the largest chainring.
4.
Turn the cable adjustment barrel counterclockwise to add cable tension
until you can hear noise from the chain rubbing the 3rd smallest
sprocket.
ON
OFF
Switch lever
Cable adjustment barrel
20