This Büchel bicycle bag is equipped with a special fastening system. The bag has two hooks that close automatically for attachment to the side of the luggage carrier. The bicycle bag is detached from the luggage carrier with a handle. The lower part of the bag is attached to the bicycle by means of a hook. This hook is rotatable, making it easier to attach the hook to the luggage carrier. Edge protection is attached to the bottom edge. This increases stability and reduces the risk of accidents. The bag is secured with a snap closure. The holder for the shoulder strap is located on the sides. This means that the user can also use the bicycle bag as a shoulder bag if necessary. Due to the handle, the bag can also be used as a carrying bag. In this way, the user is flexible at all times.