Bosch ZEMO SU-E FS 12 Translation Of Original Operating Instructions page 111

Position on roadster
Upright, almost vertical
posture,
back at an angle
Angle of upper body
of almost 90°.
(black dashed line)
Handlebars and handles
are very close to the
upper body.
Extremely acute angle at
around 20°.
The upper arms are
Upper arm-upper body almost parallel to the
angle upper body.
(red line) The hands are simply
placed loosely on the
handlebars
>10
Saddle-handlebar
The handlebars are posi-
height difference [cm]
tioned far higher than the
(blue and green line)
saddle.
The spine is intuitively
moved into its natural S-
shape.
The strain on arms and
hands is very slight – no
effort required to support.
Benefits
Force is applied relatively
inefficiently to the pedals.
Weight rests exclusively
on the buttocks.
Disadvantages
The spine slumps after a
short time for many
people (pelvic straight-
ening).
Low fitness level, occa-
Fitness level and use sional cyclists
City bike
Suitable pedelec types
Folding bike
Table 36: Overview of riding positions
MY22Z0a - 12_1.0_25.07.2022
Position on city bike Position on trekking
bike
Slightly inclined upper Sharply inclined upper
body, body,
back at an angle of back at an angle of
60°...70°. 30°...60°.
Greater distance between
handlebars and saddle.
An angle of 75°–80° is An angle of 90° is
optimum. optimum.
Many people prefer a The muscular support
smaller angle of up to 60° required in the arms, back
as it requires to less effort and shoulder girdle is
to support the shoulders, reduced at 90°.
arms and hands.
10... 5 5... 0
The handlebars are posi- Handlebars and saddle
tioned higher than the are almost at the same
saddle. height.
The upright position Shoulders, neck and
provides a good over- hands provide more of
view in traffic. the support effort, thus
Force can be applied to promoting a dynamic,
the pedals when pedalling agile riding style. Impact
without using much is reduced on the back,
energy. spine and buttocks, which
is particularly important
on longer rides. The
whole body can apply
force to the pedals effec-
tively.
The arms are often There is greater strain on
stretched through to the the hands, neck and
high handlebars – this shoulders. The muscular
leads to tense shoulders system needs to be
and painful hands. trained for this higher
The spine tends to slump strain, i.e. riders should
quickly due to the "high practise.
position".
Medium fitness level, city Medium to high fitness
cyclists level, riding long
distances
City bike Trekking bike
Cargo bike
Operation
Position on sports
bike
Greatly inclined upper
body,
Back at an angle of
15°...30°.
Saddle higher than the
handlebars.
Above 90°
Shoulders, arms and
hands need to provide a
great deal of support, the
supporting muscles in the
back are heavily strained
and the load on the
bearing surface shifts to
the front.
< 0
The saddle is positioned
far higher than the
handlebars.
Optimum power transmis-
sion.
Aerodynamic: low air
resistance.
Requires highly trained
muscles in back, legs,
shoulders, abdomen!
Comfortable riding posi-
tion only for people who
are fit.
Speed-oriented, sports
pedelec riding
Mountain bike
Racing bicycle
110