How can I tell that carbon parts are broken or need to be replaced?

Defects in carbon are usually recognized by cracks, breaks, holes or dents. Before an optical defect becomes apparent, crunching, creaking or popping noises occur. These noises occur when the carbon layers separate and rub against each other. If any of this occurs, caution is advised, and the bike should be taken for inspection and examined.

Replacement of carbon parts is usually only necessary after a real defect, for example due to a fall or incorrect assembly. The life cycle of carbon products is usually longer than most riders keep the product.