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This video shows a bicycle frame being loaded and fatigued in the fore and aft direction.  Compliance to the testing for a racing bicycle would be 100,000 cycles of fatigue, without cracks or fractures.

In this video, we demonstrate a typical wheel testing assembly supported inside a safety enclosure. In this configuration, a fully assembled wheel is mounted to a pivoting assembly. The pivot assembly is adjusted so that with the wheel resting on the drum, the arms are parallel to the ground and the motion of the wheel.

Fatigue failure occurs after repeated cycles of stress, but at a stress that is less than that which would be required for the failure to occur with a single application. Fatigue tests are essential because they help to evaluate the risk of a fatigue fracture. The EFBe test set-up is extensively similar to EN standards [...]

Failure of bicycle components such as the handlebar can result in a loss of steering and braking control and/or a lack of support for the rider’s weight, thereby leading to serious injury. Because bicycle manufacturers mix and match components from different suppliers, one particular assembly may be formed from components with a variety of structural [...]

After the bike wheels, cranks are the second most important component that drives the bike forward. Our crank tests measure the weight along with the stiffness to ensure that there are no potential defects that could cause accidents. A good bicycle crank should ease and enhance ride quality.