What is the purpose of an anti-derailment bracket?

If you've ever ridden on extreme roads like the cobblestones of Roubaix or in Cyclocross, you're probably familiar with derailment anxiety.

The answer to this fear of derailment is the anti-derailment bracket ! Allowing the chain within the front derailleurIt's generally designed to be fitted to a braze-on system, but can also be found on collar derailleurs.

Aside from extreme practicality, it also makes your drivetrain more reliable, to avoid unpleasant surprises that can lead to a crash, especially when switching from a large to a small chainring when your front derailleur setting isn't perfect.