Chain roller
32
HP
Velotechnik
37
Chain roller
The chain roller guides the chain below the
seat to the rear wheel.
Compared to other models the chain roller
has a big diameter and it has a higher area in
the middle to make the chain move as
smoothly as possible. Due to this higher area
the chain does not lie on the roller with its
sharp edged links but with the bushes in the
middle that work like small bushings. In addi-
tion 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 area in
the middle.When this middle area 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 purchase the
plastic part without the bearing or the com-
plete 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 this may destroy the sealings
and remove grease from 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,
page 30.
The chain roller is mounted with a special high
strength screw of the German strength grade
12.9 and it should only be replaced by a screw
of the same type and strength.
Caution!
If this chain retention hook is
missing the chain may fall down.When you
start pedaling then the chain roller, the seat
or the frame may be damaged through the
chain. Please consult your local specialist
dealer in case this hook is missing.
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.
