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MULTI-SPEED HUBS (INTERNAL GEAR HUBS) Operation and control
The advantages of multi-speed hubs (d+e) are their enclosed design. Unlike derailleur gears the gear drive is within the hub body, only the primary ratio from the chainring to the sprocket being outside. What is more, all the gears can be shifted through with one gear shifter.
Provided that it is serviced regularly, the drive chain has a comparatively longer service life. And this applies even more if it is protected from the influences of the weather by a sealed chain box.
With multi-speed hubs normally the power transmission and the gear ratio adjustment is guaranteed via one or several planetary gears, depending on the number of gears. To change gears the pedal force should be reduced shortly.
In contrast to derailleur gears, multi-speed hubs cannot only be combined with manually actuated brakes (rim, drum, roller or disc brakes), but also with back-pedal brakes (f) (roller or drum brakes) that are actuated by a reverse rotation of the pedals. The best braking power is achieved with the pedals on a horizontal level.
WARNING
Always make sure changing gears makes as little noise as possible and is absolutely jerk-free.
Make yourself familiar with the operation of your gears in a place free of traffic and practise operating the shifters or the twist grips as well as the brake system, before using your bike on public roads.
There are some multi-speed hubs where the effects of the back-pedal brake depend on the selected gear. Read the gear manufacturer’s manual carefully and make yourself familiar with the brake function before using your bike on public roads.
d
e
f
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