Adjust the B-screw.
Adjust the gap between the largest sprocket and the guide pulley to one of the following dimensions based
on the cassette size being used.
Model name
Cassette sprocket
Distance between largest sprocket and
guide pulley
RD-R9250 / RD-R8150
11-30T
14 mm
RD-R9250 / RD-R8150
11-34T
6 mm
RD-R7150
11-34T
10 mm
RD-R7150
11-36T
6 mm
Distance
The B-screw can also be adjusted using the included GG adjustment gauge. Set the GG adjustment
gauge on the plate as shown in the figure, and align the tip of the largest sprocket with the line of
the GG adjustment gauge using the B-screw.
The GG adjustment gauge for the RD-R9250 and RD-R8150 differs from that of the RD-R7150.
Ensure you are using the correct GG adjustment gauge for your rear derailleur.
2.
Adjustment
Adjusting the rear derailleur
30
