Since there are in-house trainings on the bike frame, the topic of cable management is made more difficult. Each frame manufacturer uses a different system and a different size. Annoying when the change of the train or the switch cable, the small cable passage is lost or even if one times broken. Fortunately almost all frame manufacturers offer this small, necessary accessory. For older bikes, the cable guidance under the bottom bracket is often also interesting for a change. It is often dragged by stone-throwing and putting down. In order to keep the switching comfort clean, an exchange is useful.