40
HP
Velotechnik
Chain roller
Chain roller
The chain roller guides the chain below the
seat to the rear wheel and is an essential part
of the HP V
ELOTECHNIK
No Squat design. It en-
sures that no pedalling influences get into the
suspension.
Compared to other models the chain roller
has a big diameter and it has a higher section
in the middle to make the chain move as
smoothly as possible. Due to this higher sec-
tion the chain does not lie on the roller with
its sharp edged links but with the bushes in
the middle that function like small bushings. In
addition to a very low rolling resistance it also
supports a quiet chain movement.A chain re-
tention hook between the frame and the chain
roller locks the roller at the bottom and keeps
the chain on the roller when you pedal back-
wards.
The chain roller wears slowly and gradually
shows a sprocket shape in the higher section
in the middle.When this middle section is
worn completely the links of the chain will run
on the roller. In that case you will notice that
the chain makes more noise while running and
you should change the roller. You can pur-
chase the plastic part without the bearing or
the complete roller through your dealer.
The chain roller is not symetrically shaped; the
recessed side of the chain roller has to face to
the frame, the flat side outwards.
The bearings must not be treated with a jet of
water from a high-pressure cleaner or with
solvents since it destroys the seals and re-
moves grease in the bearings. If the bearings
don't move smoothly anymore you'll have to
replace them.
Dismounting the chain roller
See the notes on changing the chain tubes,
p. 39.
Caution!
If this chain retention hook is
missing the chain may fall down.When you
start pedalling then the chain roller, the seat
or the frame may be damaged through the
chain. Please consult your local specialist
dealer in case you have lost this hook.
Caution!
The roller comes with two main-
tenance free sealed bearings.The bearings
are exchangeable. Between the bearings
there is a spacer that keeps the correct dis-
tance. If you forget to put in the spacer after
you have dismounted the bearings they will
be destroyed when you tighten the screw
while remounting them.
