Abstract: In order to provide a foldable bicycle frame which can be folded to form a very small packing size on the one hand and also satisfies high stability requirements on the other hand, a foldable bicycle frame is provided in accordance with the invention, comprising a seat tube (1) for accommodating a seat post (2), an upper tube (3), a head tube (4), a lower tube (5), two chain stays (6) and two seat stays (7), wherein a first releasable locking mechanism is provided in order to connect, in an unfolded state of the bicycle frame, the seat post (2), the seat tube (1), the upper tube (3) and the seat stays (7) in a rigid and detachable manner to each other and to fix the position to each other.

Abstract: In order to provide a foldable bicycle frame which can be folded to form a very small packing size on the one hand and also satisfies high stability requirements on the other hand, a foldable bicycle frame is provided in accordance with the invention, comprising a seat tube (1) for accommodating a seat post (2), an upper tube (3), a head tube (4), a lower tube (5), two chain stays (6) and two seat stays (7), wherein a first releasable locking mechanism is provided in order to connect, in an unfolded state of the bicycle frame, the seat post (2), the seat tube (1), the upper tube (3) and the seat stays (7) in a rigid and detachable manner to each other and to fix the position to each other.