Derby cycle Pedelec - Rims; Checking for Rim Wear;Fatigue on Rim Brakes; Cleaning and Care; 28 Tyres and Tubes

Originalbetriebsanleitung Allgemein EN-53
4. If the lever does not apply any clamping force towards
the end of its movement, the pre-tension must be
increased. This is done using the rotary wheel under
the lever. Open the lever and increase the pre-tension
by turning the lever counterclockwise until the lever
generates sucient clamping force and can be closed
hand-tight.
Fig. 123 Increase the pre-tensioning
27.3 Rims
Warning
Serious falls and accidents caused by broken rims.
▪ Carbon: If you are using a bicycle with carbon
brakes and carbon rims, bear in mind that this
material has considerably inferior braking behaviour
than aluminium rims. You should also note that only
approved brake pads may be used.
The bicycle rim is the supporting, ring-shaped metal prole
on a wheel, which accommodates the tyre, tube and rim
tape. The rim is usually connected to the hub of the bicycle
by means of spokes.
27.3.1 Checking for rim wear/fatigue on rim
brakes
Warning
Serious falls due to locked wheel.
▪ Check for wear on your rims at least once a year. If
the rim wall is less than 0.7 mm thick, it may break
open while riding.
Wear/fatigue on the rims can be detected in dierent ways.
The easiest is a visual inspection. Examine the rim; you
should replace the rims or consult a specialist workshop if
you notice any of the following:
▪ Broken rim arch
▪ Cracks at the spoke attachment point
▪ Round, worn-down braking anks
▪ Dark spots at spoke height
▪ Worn wear indicator
Many rims have a milled ring or a single small hole, the so-
called wear indicator. If this can no longer be seen or felt,
the rim is worn out.
Fig. 124 Broken rim arch Fig. 125 Cracks on the spoke
Fig. 126 Dark spots Fig. 127 Wear indicator
27.3.2 Cleaning and care
Notice
Pedelec/S-Pedelec: motor damage caused by water
ingress.
▪ When you are cleaning the rims, make sure that no
water gets into the motor.
Please remove the battery before cleaning the rims of an
S-Pedelec or Pedelec. Then, brush the rims with a soft
brush. Heavier soiling can be removed with a soft, damp
cloth.
28. Tyres and tubes
Warning
Serious falls due to bursting tyres.
▪ Tyres are wear parts. Check the prole depth, pres-
sure and the condition of the sidewalls regularly.
Replace worn tyres before using the bicycle again.
There are a variety of dierent types of tyres. O-road
mobility and rolling resistance will depend on your tyre
prole.