8
HP
Velotechnik
In order to check the adjustments have anot-
her person hold the bicycle while you are sit-
ting on the recumbent.
Adjust the front boom in such a way that your
leg is fully extended when your heel (wearing
flat shoes) is in the foremost position on the
pedal. Experience shows that the pedal-to-seat
distance on a recumbent can be slightly longer
than on a conventional bike.
While you are pedaling, the ball of your foot
should be positioned over the center of the
pedal axle.
It is important that your leg is not fully straigh-
tened when the crank is in the foremost posi-
tion. If the distance is too great it is difficult to
overcome this dead point, pedaling becomes
uncomfortable and there is too much strain on
the sinews of your feet and legs. If the distance
is too short you may suffer from knee pain or
your legs bump on the handlebar.
For riders with a short leg length the front
boom has to be cut by a bicycle mechanic, so
that it can be inserted to the maximum. It is
important to trim the end of the tube neatly.
The bare metal of the shortened tube end has
to be protected against corrosion with a paint
stick or wax spray.
Adjust the front boom so that the bottom
bracket axle is horizontal when you look at it
from the front. For that purpose look beyond
the bottom bracket shell at the rear wheel
axle and align the front boom parallel to it.
Align your eyes with the bottom bracket axle
and not the front changer tube above.Then sit
on your bicycle and check the position. (Hint:
When you have the impression that the bot-
tom bracket is turned alternately to the left
and then to the right when cycling you will
have found the correct middle position).
Tighten the screw with a torque wrench
(tightening torque 14–16 Nm). On your first
ride check whether there is sufficient clamp-
ing.
Adjusting the leg length
Adjust the front boon so that your knee will not be fully straighte-
ned when pedaling.
Danger!
When you insert the front boom,
the front boom and the inner wall of the
tube must be totally free from grease, other-
wise it won’t clamp properly and turn while
you are riding.
Caution!
When you move the front boom
take care that its end does not damage any
light cables that possibly come out of the
main frame near the fork. Please inform
yourself about the length of the front boom
on your bike before you do any work.While
moving the front boom you also have to
move the light cables The light cable must
never be stressed by pulling.
