Shimano ST-7S20 - User Manual

1.
2.
SI-61S0C
ST-7S20
BL-TY21
CJ-7S40
Rapidfire Lever
SERVICE INSTRUCTIONS
Before use‚ read these instructions carefully‚ and follow them for correct use.
Brake Lever
Cassette Joint
Be sure to shift the lever one gear at a time, and reduce the
force being applied to the pedals during shifting. If you try to
force operation of the shifting lever while the pedals are being
turned strongly, your feet may come off the pedals and the
bicycle may topple over, which could result in serious injury.
Be sure to read these service instructions in conjunction
with the service instructions for the Inter-7 hub before use.
CAUTION
Rapidfire lever operation
Push the top or bottom of the lever body to shift the gears.
Installation of the lever
Install the lever as shown in the illustration.
Installation of the shifting cable
Set the Rapidfire lever to .
Next, pass the inner cable through the hole at the rear of the
Rapidfire lever.
1
Indicator moves toward
7
Depress
Pass the inner cable
through the hole.
Lever body
5 mm Allen key
Screwdriver
22.2 mm
The installation angle can be adjusted to one of two
positions to suit the shape of the handlebars. Angle
adjustment is carried out by loosening the lever body fixing
bolt.
The clearance between the cable adjusting bolt and the
handlebars should be 4 – 6 mm.
The end of the lever operation section should not hit the
grip.
ST-7S20 Rapidfire Lever
Note:
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
3
4
5
6
7
BL-TY21 Brake Lever
Tightening torque:
2.5 – 3 Nm {25 – 30 kgfcm}
Tightening torque:
2.5 – 3 Nm {25 – 30 kgfcm}
Set to
1
Pedaling becomes heavier
Indicator
Attach to the straight
section of the handlebars.
Inner cable fixing bolt unit
101 mm
Pull the inner cable while attaching
the inner cable fixing bolt unit.
After checking that the end of the outer casing is sitting securely
in the cable adjusting bolt of the Rapidfire lever, attach the inner
cable fixing bolt unit to the inner cable.
Note: Do not use this inner cable fixing bolt unit with
the CJ-4S30 cassette joint.
Inner cable fixing nut
Inner cable fixing washer
10 mm
(Black)
Inner cable fixing bolt
Tightening torque:
4 – 6 Nm {40 – 60 kgfcm}
Pass the inner cable through the hole.
Indicator moves toward
1
Pedaling becomes lighter
t

Summary

Rapidfire Lever Operation

Lever Shifting Mechanism

Push the top or bottom of the lever body to shift gears, observing the indicator's movement.

Shifting Cable Installation

Inner Cable Routing

Pass the inner cable through the hole at the rear of the Rapidfire lever.

Inner Cable Fixing

Attach the inner cable fixing bolt unit to the inner cable after outer casing seating.

Lever Installation and Adjustment

Mounting and Clearance Check

Mount lever to handlebars, adjust angle, and verify clearance for optimal operation.

Cassette Joint Adjustment

Initial Alignment Procedure

Set Rapidfire lever to 4 and align red setting lines on bracket and pulley for correct function.

Alignment Verification

Check red setting line alignment when the bicycle is upside down or standing up.

Final Cable Trim

After adjustment, cut excess inner cable and install the inner end cap.

Shimano ST-7S20 Specifications

General

Brand	Shimano
Model	ST-7S20
Category	Bicycle Accessories
Language	English