Grips; Gear Shift; Chain Shift - ProActiv NJ1 Operating Instructions Manual

Crank
length
Grip width
Figure 11: Crank length and grip width

18.3 Grips

The grips must be held firmly with both hands
whilst driving and always held so that the ca-
bles and brake lines are oriented upwards.
Figure 12: Correct grip hold
Make sure that cables and brake lines are not
kinked or caught up somewhere. This could
cause them to be damaged which could lead to
the brakes and gear shift not working correctly.

18.4 Gear shift

18.4.1 Chain shift

For the chain shift, shifting procedures can
only occur while the crank is moving. Changing
the gear with the cranks stationary is not pos-
sible. In general, the torque applied to the
cranks should be reduced briefly while chang-
ing the gear so that the gear change can hap-
pen more quickly.
13
Pedal bearing
Hand grip
rotary axle
Crank
han-
dles
Operating instructions NJ1 e-assistant
The controls for the gear change are normally
designed so that they can be operated using
thumb / index finger switching fittings or
with a chin control (based on the thumb / index
finger switching fittings). With the 9-speed
cassette at the bottom, switching to the next
largest sprocket means a lower or easier gear,
and to the next smallest sprocket to a larger or
more difficult gear. For the 3-speed chain
wheels at the top, the behaviour is exactly the
opposite.
3-speed chain wheels
Figure 13: 9-speed cassette and 3-speed chain
wheels
With the thumb / index finger switching fittings,
gear changes are achieved by:

"Thumb switch" – operation by pressing in
the direction of travel with the thumb

"Index finger switch" – operation normally
by pulling in the opposite direction to travel
with the index finger (alternatively can also
be operated with the thumb by pressing
against the direction of travel).
Figure 14: Operation using the thumb / index finger
switching fittings
9-speed
cassette
Thumb
operation
Index finger
operation