Operation
The front boom must be clean and free from
wax or tenacious remains of chain lube to ma-
ke sure it can be easily slid in and out.
First, shift the chain to the largest chain ring
and the largest sprocket to check the correct
chain length.
Open both quick release levers. Slide the front
boom into the frame or pull it out until you’ve
reached the required frame length.
To slide the front boom in, grip the cranks and
turn them against the tensioned chain.The for-
ce on the chain helps to move the front boom
into the frame tube.
To pull the front boom out, grip the derailleur
tube if available. If you pull at the cranks, you’ll
have to turn them backwards at the same ti-
me, else the tensioned chain will balk the mo-
tion.
Moving the front boom is easier when turning
it a little bit from side to side.When doing
this, make sure the pulley bracket doesn’t
scratch the frame and its lug won’t be bent.
That’s why we recommend to only turn the
front boom clockwise (and back afterwards)
when looking from the front.
Align the bottom bracket axis horizontally
when looking from the front. Close both quick
release levers.
Move the chain to the smallest chain ring and
the smallest sprocket. Check the chain length.
The rear derailleur cage should not be com-
pletely swivelled to the back to still apply ten-
sion to the chain.
The front boom quickadjust allows an adju-
sting range of 10–15 cm. If you wish to start
or end with a different frame length, the hose
clip must be loosened and the pulley bracket
must be readjusted. Refer to 2).
9
HP
Velotechnik
Operating Instructions