Operation Manual

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PART II
ABOUT SHIMMY
Some cyclists have experienced disturbing “shimmy”
or “vibration” at certain speeds. This symptom is
rarely reported and there is no agreement among
experts as to the cause. Among the proposed causes
of shimmy are: a loose headset, frame alignment
problems, weight of front wheel magnets for cycle
computers, and spoke tension.
Larger riders on larger frames are thought by some to
be more likely to experience such vibration.
If you experience such a vibration, gently apply the
brakes and slow down. Another suggestion is to press
your leg against the top tube as you slow down.
WARNING
IF YOU EXPERIENCE “SHIMMY,”
DO NOT CONTINUE TO RIDE YOUR
BIKE. TAKE THE BICYCLE TO YOUR
RETAILER FOR INSPECTION, SERVICE,
OR CHANGES.
TOE OVERLAP OR TOE
CLIP OVERLAP
What is It?
What is It? “Toe overlap” or “Toe clip overlap”
describes the toe of your shoe, your shoe attached to a
clipless pedal or your toe clip contacting the front tire
(or front fender). This may occur when a pedal is all
the way forward and the front wheel is turned sharply
to a position where the toe or toe clip can contact the
tire (or fender). If you ride with clipless pedals, attach
your riding shoes to the pedals and check for front tire
clearance. If you ride with toe clips, check for front
tire clearance.
“Toe clip overlap” is common on small frame size
bicycles. It is simple to avoid any contact with the front
tire: have the inside pedal up before beginning a turn.
As you turn to the left, the inside (left) pedal should
be positioned at twelve o’clock. As you turn to the
right, the inside (right) pedal should be positioned at
twelve o’clock. Having the inside pedal up will prevent
any toe clip-to-tire contact and maximize cornering
ground clearance. Learn to make it your habit on any
sized bike.
Whether or not you have overlap, or how much
overlap you have can be changed. Be aware that toe
clearance can be increased or decreased by changes
in crank arm length, size of pedals or toe clips used,
size of tires used, addition of fenders, size/design of
shoes worn.
Figure 20.
WARNING
TOE CLIP OVERLAP COULD CAUSE YOU
TO LOSE CONTROL OF YOUR BIKE,
FALL AND BE SERIOUSLY INJURED,
PARALYZED OR KILLED.
Please consult with your retailer on the simple
steps you must follow to avoid an accident. Insist
that your retailer work with you to determine if
your own combination of bicycle, shoe(s) and
components have this common design feature.
TOE CLIP
OVERLAP
FRONT
TIRE
TURNED
LEFT OR
RIGHT
PEDAL