Determining The Sitting Position - Bosch i:SY E5 ZR F CX Translation Of Original Operating Instructions

6.4.2

Determining the sitting position

The starting point for a comfortable posture is the
correct position of the pelvis. If the pelvis is in the
wrong position, it can cause different types of
pain, e.g. in the shoulder or back.
Figure 96: The pelvis is in the right position (green) or
incorrect position (red)
The pelvis is in the right position if the spine forms
an S-shape and a natural, easy arch.
The pelvis is positioned incorrectly if it tilts slightly
backwards. As a result, the spine becomes curved
and can no longer deflect to an optimal extent.
A suitable sitting position must be selected
beforehand depending on the pedelec type,
physical fitness and desired trip distance or
speed.
It is especially advisable to check and optimise
the sitting position once more before longer rides.
MY23I0a - 42_1.0_22.01.2024
Position on roadster
Angle of upper body
(black dashed line)
Upright, almost vertical
posture,
back at an angle of almost 90°.
Handlebars and handles are
very close to the upper body.
Upper arm-upper body angle
(red line)
Extremely acute angle at
around 20°.
The upper arms are almost
parallel to the upper body.
Hands are simply placed
loosely on the handlebars.
Saddle-handlebar height difference [cm]
(blue and green line)
>10
The handlebars are positioned
far higher than the saddle.
Benefits
The spine is intuitively moved
into its natural S-shape.
The strain on arms and hands
is very slight – no effort
required to support.
Disadvantages
Force is applied relatively
inefficiently to the pedals.
Weight rests exclusively on the
buttocks.
The spine slumps after a short
time for many people (pelvic
straightening).
Fitness level and use
Low fitness level, occasional
cyclists.
Table 25: Overview of sitting positions
Operation
Position on city bike
Slightly inclined upper body,
back at an angle of 60°...70°.
An angle of 75°–80° is
optimum.
Many people prefer a smaller
angle of up to 60° as it requires
to less effort to support the
shoulders, arms and hands.
10 to 5
The handlebars are positioned
higher than the saddle.
The upright position provides a
good overview in traffic.
Force can be applied to the
pedals when pedalling without
using much energy.
The arms are often stretched
through to the high handlebars
– this leads to tense shoulders
and painful hands.
The spine tends to slump
quickly due to the "high
position".
Medium fitness level, city
cyclists.
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