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Velotechnik
Adjusting the seat angle
A big advantage of the Street Machine GT is
that you can adjust the seat angle very quickly.
For beginners or rides in the city you can
choose an upright seat position for a better
view, and for longer travels you can choose a
flat position for better aerodynamics.
The seat is fastened with two quick release le-
vers on slotted aluminum seat mounts.You can
adjust the angle by 10 degrees by simply ope-
ning the two quick release levers. In the me-
dium seat position the angle is about 35° from
horizontal.
Because of the special cam shape of the two
slotted holes, the seat effectively pivots around
a central axis, approximately in the area of the
lower lumbar vertebrae.This is the place whe-
re you support the biggest part of your peda-
ling force while riding, so this point determines
the distance to the pedals.The advantage of
this design is that you adjust the distance from
the seat to the bottom bracket only once as
described above, a change in the seat angle
does not require an adjustment of the front
boom.
Adjusting the seat with mounted
Speedbag
A mounted Speedbag impedes the access to
the rear quick release for the adjustment of
the seat angle.
Therefore you should adjust your seat prior to
mounting the Speedbag.You have to screw the
Speedbag to the seat afterwards.
It is possible to simplify the adjustment of the
seat by replacing the knurled nut of the rear
quick release by a big washer and a self-locking
hex headed nut.This allows you to tighten or
loosen the seat mounts with a tool you insert
from behind.
Adjusting the seat position
Caution! The two quick releases have to be
closed firmly (tightening force 15-20 kg / 45
lbs) to safely hold the seat.You are not allo-
wed to open them while riding.After they
have been closed the imprint "close" must
be visible. If the quick releases are not tigh-
tened appropriately the seat can move while
riding and you may no more be able to
handle your bicycle.