IDEAL Bikes TARGET, Instructions For Use Manual

Page: 33 / 88

33
PEDAL DRIVE
90°
90°
90°
Fig. 2: Guide to the optimum sitting position
Various factors can influence the optimum sitting position, e.g.:
-
the height of the cyclist,
-
the frame size and geometry of the bicycle,
-
the saddle and handlebar positions,
-
the conditions of use where applicable (e.g. predominantly used for sports activities).
Guidance for setting the optimum sitting position include:
-
Arm and knee (upper leg) angles are 90° when one pedal is up. Your lower leg is
slightly bent.
-
Your knee is above the axle of the front pedal when one pedal is in front.
-
Your arms are relaxed and slightly bent outwards.
-
Your back is not vertical in relation to the seat post.
Adjust the saddle and handlebar until you achieve the optimum sitting position to suit your
requirements
˃ Chap. 38 "Adjusting the saddle" on page 57and
˃ Chap. 39 "Adjusting the handlebar" on page 60
.
PEDAL DRIVE
18 General information
The term "pedal drive" refers to the process or related unit with which the bicycle is (manu-
ally) propelled.
The power applied when you push the pedals (pedalling) is transmitted to one of the wheels
via the chain (chain drive). In turn, the propelled wheel sets the entire bicycle in motion.
INFORMATION
It is generally the rear wheel that is propelled in this way.
19 Chain drive
19.1 Method of operation and handling
1
3
2
1
Chain
2
Chain ring
3
Sprocket
Fig. 3:
Chain drive components
The chain of the bicycle runs over two gear wheels, the teeth of which interlock with the
free openings between the individual chain links that make up the chain.
The gear wheel at the same level as the pedals that rotates when you start to pedal is known
as a chain ring. The rotation of the chain ring is transmitted to the sprocket on the wheel
axle via the chain. The rotating sprocket also causes the wheel to rotate, which propels the
entire bicycle and sets it in motion.
INFORMATION
In principle, it is possible to open a chain and to close it again. Individual chain links
can be inserted or removed to achieve the perfect chain length.