The bicycle frame comprises a head tube and a top tube including a first end fixed to the head tube and including a second end. A down tube includes a first end fixed to the head tube including a second end having a bottom bracket secured. A seat tube includes a lower end pivotally coupled to the bottom bracket at a first pivot axle. A seat stay includes a first end portion fixed to the seat tube so as to form a middle frame. The seat stay includes a second end, the middle frame being rotatable relative to the bottom bracket about the first pivot axle. A chain stay includes a first end pivotally coupled to the bottom bracket at a second pivot axle and including a second end. The chain stay is rotatable relative to the bottom bracket about the second pivot axle.
