Derby cycle Impulse Evo - Page 132

Original User Guide | Pedelec Impulse Evo / Impulse Evo Next Version 4 EN-25
6. Pluck the belt so that it vibrates like a guitar string. The app converts
the sound into the natural frequency of the belt.
7. Turn the crank a quarter of a revolution and repeat the measurement.
8. Compare the frequency of the belt with the reference value to see if the
tension needs adjusting.
Speciedtension
values
Short, light rider Tall, heavier rider
Hub gear
50 Hz 60 Hz
Adjusting the belt tension
1. Remove the pedelec battery.
2. Undo the bolts from the drop-out by
turning them anticlockwise.
3. Increase or reduce the tension with
the set screw. Make sure the wheel is
rettedstraight.
For 2. Loosen screws
For 3. Set screw
Set screw
IMPORTANT
KORREKTE AUSRICHTUNG CDC-ZAHNKRÄNZE SIND
NICHT KORREKT AUSGERICHTET
CDX-ZAHNKRÄNZE SIND
NICHT KORREKT USGERICHTET
Correct
alignment
Sprockets are not
aligned correctly
Sprockets are not
aligned correctly
When adjusting the tension, the correct alignment of the belt must be
maintained. Otherwise it can cause noise, premature wear of the belt
orsprocket,andthebelttocomeothedrive.
Fig.: Gates Corporation: Gates Carbon Drive User Manual. 2014, Page 13.
URL:http://www.gatescarbondrive.com/Tech/Resources(asof07/01/2016)
4. Tighten the drop-out screws to a
torque setting of 16 - 20 Nm in a
clockwise direction  12. Torque
settings Page EN-103.
For 4. Tighten screws