A cart or a small basket or a high-spec trailer that connects to a bicycle for the purpose of being able to carry what cannot be carried with you on the bicycle, for example, 3 medium-sized boxes or anything large that you cannot carry without the help of this cart or trailer. It is a shopping basket that has been built or modified to be attached to a bicycle with specifications and the installation of wheels, and the removal of some columns that are not suitable for modification, and the installation of larger, small, and fast wheels that can withstand weight. The dimensions are: length 90 cm, width 70 cm. Regarding the width, it also enters through the door easily. The dimensions were set based on the door, or any standard room door, the width is all 85 cm, not exceeding it. By the way, regarding the cart or trailer, you can easily detach it from the bicycle, and when needed, it can be easily connected. Also, the column connecting the bicycle and the cart can be detached from the cart. Look at the clip photographed below between the cart and the photographed seat. It was photographed and uploaded for clarification. The hanger or clip is shown in the picture, how it attaches to any type of bicycle, size 20, 26, 28...