Operation Manual

41
HUB GEARS
One advantage of an internally geared hub
(IGH) is the encapsulated construction. The
technical mechanisms are almost completely
enclosed inside the hub. This prevents con-
tamination from dirt and grime. The chain
on an IGH system lasts longer than on an
equivalent derailleur system. A disadvantage
is the slightly higher power losses within the
hub. IGH are sometimes used in combination
with a derailleur, freewheel and rim, roller, or
integrated coaster brake.
How they work and how to use them.
It uses a twist grip shifter to select the de-
sired gears. The Shimano IGH can be shifted
under load while the Rohlo system requires
a momentary pause in the application of
pedal power. There are several methods
used to select gears for IGH and each hub is
dierent. For questions, see the instruction
manual of the manufacturer or your dealer.
Practice shifting in a trac free
area. Practice also using the
brakes. In road trac you may
be distracted from shifting and
braking by potential hazards.
DANGER!