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HP
Velotechnik
Adjusting y
our ne
w trik
e
21
Air shock DT.S
WISS
XM180
Please follow the instructions in the separate
manual provided by the rear shock manufac-
turer.
This rear shock contains pressurized air in a
main („positive“) air chamber as suspension
medium.Air shocks are lighter than steel
spring rear shocks.Another advantage is that
the spring stiffness can be easily adjusted with
an air pump: By increasing the pressure the
spring becomes harder.
Air shocks have a progressive spring behaviour,
whereas steel springs have a linear spring be-
haviour.This means that the air shock gets
progressively harder, e.g. it is much stiffer when
fully compressed than when only slightly com-
pressed.
The advantage of this progressive spring be-
haviour is the good bottom-out protection
when heavily loaded.
The valve for the air chamber is located at the
back end of the air shock.The valve is protect-
ed by a metal valve cap.
To pump up the air shock you need a special
air pump designed for bicycle air shocks. It
must feature a fitting schrader valve adaptor
and a pressure indicator.
When attaching or removing the pump
to/from the valve, you will lose some air pres-
sure (about 0,5-1 bar).Take off the pump
quickly.
Recommended pressure settings
load
pressure
up to 80 kg (183 lbs)
7.5 bar
up to 110 kg (242 lbs)
9.0 bar
up to 140 kg (308 lbs)
10.5 bar
Maximum allowed pressure is 18 bar.
Danger!
Take care that the rear wheel or
mudguard or suspension element never hit
the frame, seat or rear rack box while the
suspension is fully compressed.
Therefore fully deflate the air shock. Have a
second person sit down on the tricycle and
make the suspension bottom out by pushing
on the seat or the rear rack.
If the distance between the wheel or mud-
guard and the frame, seat or rear rack is
smaller than 1 cm you will have to have your
trike dealer mount an additional spacer in-
side the air shock. In case you don't, the
mudguard may break suddenly or the rear
wheel might be blocked which can lead to
serious crashes.