Abstract: A bicycle mounting adapter for installing a bicycle to a mounting includes a frame and two holding tubes. The frame has a transverse member and two lateral members. The two second segments are separated by a distance greater than a distance between the two first segments. The first segment has a fixing hole. The second segment has a notch. The holding tube has an embedded segment, a propping segment, and a shoulder located between the embedded segment and the propping segment. The embedded segments are inserted into the respective fixing holes and thus fix the holding tubes to the lateral members. The two holding tubes have major axes thereof aligned with each other. The propping segments each have a terminal surface defined as a pressing surface. The pressing surfaces of the holding tubes work with a quick-release assembly to hold a fork of the bicycle.

Abstract: An attachment device is devised for attaching a fork of a mountain bicycle to a top of a car. The attachment device includes a frame, two supporting elements and a quick-release skewer. The frame includes two lateral members for attachment to the top of the car. Each of the supporting elements is attached to a corresponding one of the lateral members of the frame. Each of the supporting elements is adapted for supporting a free end of each prong of the fork. The quick-release skewer is operable for pressing the free end of each prong of the fork against a corresponding one of the lateral members of the frame.

Abstract: An apparatus is disclosed for holding a flat object. The apparatus includes a post, a supporting mechanism movably connected to the post, a clamping mechanism pivotally connected to the post, and a linking element for linking the supporting mechanism and the clamping mechanism together. Thus, the flat object is clamped by the clamping mechanism clamps when the flat object is supported on the supporting mechanism.