In most cases, a fatigue crack is not a defect but rather an indication
that the part has worn out and reached the end of its useful life. This
is similar to when car tires wear down and the tread bars touch the
road, signaling the need for replacement. When a metal part shows a
fatigue crack, it is a clear sign that it is worn out and needs to be
replaced.
Fatigue is not a perfectly predictable science, but there are some
general factors that can help determine how often your bicycle
should be inspected. If you have a riding style that puts more stress
on the bike, such as hard and harsh riding, frequent hits, crashes,
jumps, or higher body weight, you will need to inspect your bike
more frequently. Additionally, riding in corrosive environments with
wet or salt air, winter road salt, or accumulated sweat, as well as
riding in areas with abrasive mud, dirt, sand, or soil, can also shorten
the product life and require more frequent inspections.
On the other hand, factors that can lengthen the product life and
reduce the need for frequent inspections include a smooth and fluid
riding style, avoiding hits, crashes, jumps, and other impacts to the
bike, lower mileage, lower body weight, being a less aggressive rider,
riding in non-corrosive environments with dry and salt-free air, and
maintaining a clean riding environment.
It is important to consider these factors and regularly inspect your
bike to ensure its longevity and safety.
Riding a bicycle or component with any crack, bulge, or dent,
even a small one, can lead to complete failure and pose a
serious risk of injury or death.
WARNING
B. INSPECTION OF COMPOSITE FRAME, FORK, AND COMPONENTS
CRACKS:
Inspect for cracks, broken or splintered areas. Any crack, regardless of
size, is considered serious. Do not ride any bicycle or component that
has a crack.
Delamination: A delamination is a severe form of damage in
composites, where the layers of fabric are no longer bonded
together. Do not ride any bicycle or component that shows any signs
of delamination. Here are some clues to identify delamination:
1. Cloudy or white area: Delaminated areas will appear different from
undamaged areas, often looking opaque and cloudy compared to
the glossy and deep appearance of undamaged areas.
2. Bulging or deformed shape: Delamination can cause changes in the
surface shape, resulting in bumps, bulges, soft spots, or uneven
surfaces.
3. Difference in sound when tapping: Tap the surface of an undamaged
composite, and you will hear a consistent, hard, and sharp sound. Tap
a delaminated area, and the sound will be duller and less sharp.
Unusual Noises:
Both cracks and delamination can cause creaking noises while riding.
Treat any unusual noise as a serious warning signal. A well-maintained
bicycle should be quiet and free of creaks and squeaks. Investigate and
fix the source of any noise before riding, as it may indicate a crack,
delamination, or another issue that needs to be addressed.
Always prioritize safety and ensure that your bicycle and its components
are in good condition before riding.
To access the online user manual, view the
instructions for using the freebeat app, please
scan the QR code provided below.
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