Abstract: Front and rear portions of a bicycle frame are connected together by a flexible spring member that includes at least two laterally spaced, elongated rods extending between opposed mounting blocks in the front and rear portions of the frame. The ends of the rods are held in the mounting blocks by releasible clamps that permit removal and replacement of the spring members when desired. One bicycle frame incorporates a folding mechanism that permits front and rear portions of the bike to be folded together for easy portability of the bike. In one frame, the seat is mounted on the front portion, so the spring cushions rear wheel impact. A replaceable wire management tube is attached to the side of the crossbar of the bike by adhesive tape.