Shimano SG-8C20 Service Manual - Page 5

Browse online or download pdf Service Manual for Industrial Equipment Shimano SG-8C20. Shimano SG-8C20 36 pages. Inter-8 coaster hub
Also for Shimano SG-8C20: Technical Service Instruction (4 pages)

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SG-8R25

Premium Version for Roller Brake

SG-8R20

Roller Brake Version

SG-8R25-VS

V-Brake Version

SG-8R20-VS

V-Brake Version

SG-8C20

Coaster Brake Version

• Gear Change Support Mechanism

Shimano's gear change support mechanism uses

pedaling power to aid down-shifting. The result

is fast and accurate down-shifting with an exep-

tionally light feeling. Mechanical shifting resist-

ance is notably reduced so shifting is not affected

under high loads.

shifting torque

driver rotation torque

• Smooth Gear Change

The smaller idling angle realizes shockless

smoother shifting for stressless comfortable gear

change.

INTER-7

20~90º

• Smoother Rotation

Shimano's precise manufacturing abilities

construct an internal hub that rotates with

significantly less drag than previous models.

• Close Ratio Wider Range

The INTER-8 hub has increased its gear ratio to

307%, compared to 244% of the INTER-7 hub.

2.0

1.5

244%

low-high

difference

0.84 (24T)

1.0

0.74 (27T)

0.63 (32T)

0.75 (27T)

0.64 (31T)

0.5

0.53 (38T)

1st

2nd

3rd

INTER-8

10~30º

1.55 (13T)

1.34 (15T)

1.42 (14T)

1.15 (17T)

0.99 (20T)

1.22 (16T)

1.00 (20T)

0.85 (24T)

4th

5th

6th

7th

• Better Sealing

The INTER-8 hub has adopted a labyrinth seal

system that shuts out water and dirt to extend

the service life and maintain smooth shifting in all

circumstances. Optionally a waterproof dust cap

can be installed ex factory on the non-drive side

before shipment, in case you wish to use the hub

in combination with a seperate brake system such

as V-Brakes.

labyrinth seal

• Robust Construction

Durable planetary and step-up gear sets assure

long trouble-free service.

ST-8S20

Shifter with 3-finger Brake Lever

BL-IM65

3-finger Brake Lever

SB-8S20

Shifter with 4-finger Brake Lever

SL-8S20

Shifter

BL-IM60

4-finger Brake Lever

• Fast and Light Shifting

In combination with the Gear Change Support

Mechanism the shifting action is quick and light

even during hight pedaling loads.

• Easy-to-read Gear Indicator

Larger more visible indicator numbers make gear

positions easier to read. Additionally, indicator

symbols help to understand the direction of

shifting progression.

• INTER-8 (SG-8C20): 30% more braking

power compared to INTER-7

30% more powerful

3.0

2.5

2.0

1.0

0.0

1.61 (12T)

307%

low-high

difference

8th

INTER-8

INTER-7

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