About Shimmy; Toe Clip Overlap - Cannondale Synapse Carbon Owner's Manual

PaRt ii

aBoUt shimmy

Some cyclists have experienced disturbing "shimmy"
or "vibration" at certain speeds.
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 Ride
ContinUe to Ride yoUR Bike. take the
BiCyCle to yoUR RetaileR foR insPeCtion,
seRviCe, oR ChanGes.

toe CliP oveRlaP

What is it?
"Toe clip overlap" or "toe overlap" describes the toe
of your shoe or toe clip contacting the front tire (or
front fender). This may occur when the pedal with
your shoe (with or without a toe clip) 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.
This symptom is
Figure 20.
"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.
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.
48
FRONT
TIRE
TURNED
WaRninG
TOE CLIP
OVERLAP
LEFT OR
RIGHT
PEDAL