The AtranVeloSystem is a patented, minimalistic system for the secure attachment of accessories to a bicycle. It includes a range of high quality bags, baskets and boxes for many needs and bicycles. The accessories are modular and compatible with front and rear carriers so that items can be transported in a flexible way. With a special mechanism, which can be operated with only one hand, the position or the accessories can be changed intuitively. The user can easily remove or attach the basket without having to hold the bicycle.