GEARS
DERAILLEUR SYSTEM
Some DYU eBikes come with gears, which consists of:
• Rear sprocket cluster, called freewheel or cog set
• Rear derailleur
• Shifter
• Control cable
• Front sprocket, called chaining
• Drive chain
The gear mechanism differs in ergonomic design, performance and price.
A downshift is a shift to a lower or slower gear, which makes pedaling easier. An upshift is a shift to a
higher or faster gear, which makes pedaling harder. In practice, you can upshift to go faster, and you can
downshift to go uphill.
A shift is possible only when you are pedaling forward, i.e. the drive chain is moving forward and under
some tension.
CAUTION
Never shift when pedaling backward. Also, do not pedal backwards after a shift. Either action may jam the
chain and cause serious damage to your eBike.
The derailleur system includes front and rear derailleurs,
shift levers, and derailleur control cables. For smooth
shifting, all components must function properly.
Although the front and rear derailleurs are initially
adjusted in the factory, you need to inspect them before
each ride.
To begin, twist the shifter to the largest number indicated,
and the cable shall loosen the anchor bolt on the rear
derailleur, placing the chain on the smallest sprocket.
Adjust the high limit screw so that the guide pulley and the
smallest sprocket are lined up vertically. Re-tighten the
cable, pull out any slack, and re-tighten the anchor bolt
securely. Shifting through the gears, making sure that
each gear is achieved quietly and swiftly.
If necessary, use the barrel adjuster to fine tune the cable
tension by turning it the direction you want the chain to go.
For example, turning clockwise loosens cable tension and
moves the chain away from the wheel, while turning
counter-clockwise tightens cable tension and direct the
chain towards the wheel.
Freewheel
Pulley
Adjustment
Screw
Guide
pelley
Tension
Pulley
Adjustment
Screws
Cable Barrel
Adjuster
Rear Derailleur
Side View
Barrel
Adjuster
High Gear
Adjustment
Screw
Low Gear
Adjustment
Screw
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