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One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003

High Tech Campus 92, 5656 AG Eindhoven, The Netherlands Phone: +31-402-612222

3-77 Oimatsu-cho, Sakai-ku, Sakai City, Osaka 590-8577, Japan

Please note: specifications are subject to change for improvement without notice. (English)  
© May 2019 by SHIMANO INC. ITP

Operation

Braking operation

Gear shifting operation

Be sure to keep turning the crank during the lever operation.

Caution on operation

Both lever  A  and lever  B  always return to the start position when they are released after 
shifting.
Do not push levers  A  and  B  simultaneously. When the levers are pushed simultaneously, 
the gears will not shift.

*  Some models allow two-step gear shifting.

Operation of levers

Front

Rear

Shifts from 
smaller to 
larger 
sprocket

Lever  A  
start position 

Lever  A  

start position 

1  Click

2  Click

1

2

4 3

5

Shifts from 
larger to 
smaller 
sprocket

Lever  B  
start position 

Lever  B  

start position 

4 3

ST-RX810-LA

1

 Operate the lever  C  in the direction 
indicated with the arrow

2

 Adjust the height of the seat

3

 Release the lever once the seat is at the 
appropriate height

Lever  C  
start position

1  

2  

Trimming (noise prevention mechanism) operation

If the front derailleur comes into contact with the chain and makes noise, perform the following 
operation to eliminate the noise.

Chain  

position

Trimming 

operation

Chain  

position

Trimming 

operation

Lever operation

Lever operation

Largest 
chainring

Smaller 
sprockets

Lever  A

(Hits)

Click

Largest 
chainring

Larger 
sprockets

Click

Lever  B

(Hits)

Smaller 
sprockets

Smallest 
chainring

Smallest 
chainring

Larger 
sprockets

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