The KLICKfix Box GTA bicycle bag is a durable case that is mounted on the rear rack. The case features a clip that allows it to be attached using the GTA adapter. The Box GTA has a fairly large capacity and can easily fit a helmet. The case is waterproof and has a closed mechanism, allowing for the secure storage of items. The German company Rixen & Kaul, which owns the KLICKfix brand, was founded in 1988 by two passionate cyclists. During its first year of operation, the company developed the KLICKfix handlebar adapter, which defined its future direction. Instead of loose and bulky straps, a stable and user-friendly adapter was introduced for mounting baskets and bicycle bags. KLICKfix is now the most widespread quick-release system for bicycles. In developing its products, the company pays special attention not only to quick installation but also to high durability and stability.