
Click to enlarge shaft drive
Driveshaft Specification Unit's
1 B.B.Parts (front gearbox) Aluminum 1
2 B.B.Shell Steel (56.6 x 51.5 x 52L ) 1
3 Right Cover Aluminum Alloy 1
4 Left Cover " 1
5 Front Stand " 1
6 Rear Stand " 1
7 Rear Gear Box " 1
8 Transmission Tube " 1
9 Crank Axle B22-Steel 1
10 Transmission Axle Carbon Steel 1
11 Crank Axle Gear Cromoly 1
12 Front Trans. Gear " 1
13 Rear Trans. Gear " 1
14 Hub Gear " 1
15 Right End Steel 1
16 Left End Steel 1
17 Washer n/a 1
18 Bearing 6003 n/a 3
19 Bearing 6203 n/a 2
20 Cap Screw Inner Hexagon M5 x P0.8 x 12 3
21 Cap Screw Inner Hexagon M5 x P0.8 x 14 8
22 Cap Screw Inner Hexagon M5 x P0.8 x 20 3
23 Cap Screw Inner Hexagon M6 x P1 x 16 2
24 Cap Screw Outer Hexagon M6 x P1 x12 2
25 Screw Tapping M4 x 20L 2
26 Washer 6.4 T = 1.6mm 4
27 Spring Washer 5.1 T = 1.3mm 14
28 Spring Washer 6.1 T = 1.5mm 4
29 Sprocket Circlip T = 2.3mm 1
30 Rear Gear Box Cover P.V.C 1

Click to enlarge exploded driveshaft diagram
Shimano SG-7R45

Inter-7 Rear Hub (7-speed)
- Internal Gear Shifting
- Shifting action is independent of pedalling. You can shift gears anytime, while standing still, pedalling, or coasting.
- Heavy-Duty Construction Rugged planetary and step-up gear sets assure long trouble-free service.
- Shift Modulator Mechanism Smoothes out the shifting action while pedalling.
 Click to enlarge rear hub cutout
Function Name Inter-7
Speed 7-speed
Silent Clutch No
Shifting Power Modulator Yes
Shifting Lever SB-7S45, SL-7S10, ST-7S20
Internal Brake Inter M Brake BR-IM41-R, BR-IM50-R
Corrosion Resist Coating Yes
Gear Ratio Total 244&--37;
Gear Ratio 1 - 0.632
Gear Ratio 2 - 0.741
Gear Ratio 3 - 0.843
Gear Ratio 4 - 0.989
Gear Ratio 5 - 1.145
Gear Ratio 6 - 1.335
Gear Ratio 7 - 1.545
Axle length 201 / 182 mm
Over Lock-nut Dimension 130 mm
Spoke Hole 36H
Spoke Size --13, --14
Sprocket Teeth 16, 18, 19, 20, 21, 22, 23T
Chain-Line 15T -
Chain-Line 16T 45.3
Chain-Line 18T-22T 40.3 / 45.3
Weight 1465g
Gear Change Support No
Cassette Joint CJ-7S40 / CJ-NX10 / CJ-NX40
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