Frames are concerned very often, but it’s the cause that is decisive. On the one hand there are defects as a result of poor construction or defective processing. On the other hand there is damage due to overload, e.g. as a result of a fall or pre-damage due to inappropriate handling.

What about carbon compared to aluminium and steel?
According to my experience, steel and aluminium frames are clearly more prone to so-called fatigue breaks. As regards the service life under normal conditions, I'm fully relaxed with high-quality carbon. A critical point is reached, when the bicycle topples over. Incidents resulting in minor damage like dents on aluminium or steel tubes, lead to cracks on a carbon tube.

What are the classic handling errors?
Much too often carbon fails due to overtightening. The assembly requires care and accurateness. Another classic: clamping carbon frames on car roof racks. The wrong combination of parts also produces damage. The days when you could assemble your bicycle with a simple multi-tool are over in these days with carbon parts. In particular the clampings require professional handling and special tools.