13
DANGER!
Do not ride your e-bike if concerned
about any of these points! If in doubt
please consult a qualified bike mechanic.
A faulty e-bike can result in accidents!
DANGER!
After a crash or accident, a qualified bike
mechanic must inspect your e-bike for
damages before you use it again.
10. Quick releases
A quick release axle allows you to remove the wheel
of your bike without the use of a tool. Even though
quick releases are very convenient, many accidents
occur because of their misuse. So please pay
attention to the information in this chapter.
A Quick Release uses over-centre cam action to
clamp the component in place and allows for easy,
tool-less removal. A Quick Release has a Clamp, an
Acorn and a Lever.
The concave side closes inward. The Acorn allows
you to adjust the clamping force. Closing the Lever
as it passes the over-centre point requires increasing
force. This force should require you to use the palm of
your hand.
Quick release handling
• Open the lever. You should now be able to read
the word “Open“.
• To close it, move the lever so that on the outside
it reads ”Close“. At the beginning of the closing
movement, about halfway through its travel, the
lever must be slightly tight.
• During the second half of the lever’s travel, the
leverage increases significantly. Finally, the lever
is very tight and is difficult to move. Use the palm
of the hand to close the lever. Once closed the
lever must be parallel to the wheel and not project
out laterally.
• Check the fit by attempting to turn the closed
lever. When the lever rotates, it is not safe to use
the e-bike. You have to open it again to retighten
it. Do this by turning the Acorn one-half turn
(while holding quick release).
• Repeat the closing process and check the fit
again. When the lever no longer rotates, it is
clamped properly.
• Check the tightness of the wheel: lift the wheel
several inches off of the ground and give the top
of the tyre a little whack. A securely fixed wheel
should remain in the frame.
• When tightened on Wheels, the Quick Release
should emboss the Fork Dropouts.
DANGER!
Quick Releases are very convenient,
but many accidents occur because of
misuse. Improper adjustment may result
in damage to the bicycle or in an accident
which can cause serious injury or death.
Check that quick releases and important
nuts and bolts that keep your wheels,
handlebar and seat post in place
are properly closed and adequately
tightened. Correct tightening force is
vital. Too little force and the fastener may
not hold securely. Too much force and
the fastener can strip threads, stretch,
deform or break. Either way, incorrect
tightening can result in component failure
and cause loss of control and accidents.
See chapter 21 for correct torque values.
If you’re unsure, visit a qualified bike
mechanic and ask them to show you the
proper way.
DANGER!
Never ride a bike without first checking
that the wheels are securely attached to
the frame with a quick release or bolt. If
not securely attached, the wheel could
fall out during the ride and lead to a
severe injury! Check the tight fit of quick
releases, thru axles and bolts even if you
parked your e-bike only shortly at an
unattended place. Do not ride your e-bike
with untightened quick releases.
TIP!
Components secured with a quick release
are at risk of theft. If possible place an
additional lock on the wheels when you
park the e-bike.
11. Riding position
The correct riding position is essential for comfort
and power delivery. While seated, you should have a
slightly bend knee when the Pedal is pushed down all
the way. The leg should not be fully extended so make
sure the Saddle is not too high. If the seat is too low,
repetitive strain on the knee may lead to pain.
Summary of Contents for Bike One 2021
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