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5. Accessories.
5.8 Crank shortener (continuously adjustable)
The adjustable crank shorteners are to be
mounted onto the cranks with clamps. Plea-
se note here that the crank shortener mar-
ked "R" is to be mounted on the right-hand
side and the crank shortener marked "L" is to
be mounted on the left-hand side. The ad-
justment of the crank shortener is to be un-
dertaken so that the amplitude of the pedal
depicts the flexibility of the knee joint. In the
lower pedal position, the maximum extensi-
on to be achieved, and in the upper position,
the maximum flexion of the knee is to be achieved. This adjustment is to
be undertaken in interaction with the saddle height. In order to adjust the
continuously adjustable cable shortener, loosen the screw (
A
) and bring
them into the required position.
5.9 Crank shortener
The crank shortener must be mounted onto
the cranks using the screw included in deli-
very and the clamp, and shortens the crank
by 2.5 or 5 cm. Please note here that the
crank shortener marked "R" is to be moun-
ted on the right-hand side and the crank
shortener marked "L" is to be mounted on the
left-hand side. The pedal is to be mounted in
the required position in the crank shortener.
The position of the pedals must be conducted so that the amplitude of
the pedal depicts the flexibility of the knee joint. In the lower pedal po-
sition, the maximum extension to be achieved, and in the upper position,
the maximum flexion of the knee is to be achieved. This adjustment is to
be undertaken in interaction with the saddle height. In order to adjust the
crank shortener, loosen the pedals with a 15mm open-end wrench and
place it into the opening (
B
).
5.10 Special crank for knee contracture
The special crank for knee contractures is
suitable for 20" - 26" tricycles, and can either
be mounted on the left or right-hand side.
B
A
