Pedal lever distance adjusting structure for sport exercise cycle

A pedal lever distance adjusting structure of a sport exercise cycle, mounted between a sport exercise cycle that has a driving structure and two pedal support racks (20), said sport exercise cycle being driven by a driving member that includes a single direction ratchet wheel (10) co-operating with a spring (11), and said driving member being driven by a pedal lever (15) of said sport exercise cycle;

• wherein,
• each of said two pedal lever support racks (20), is pivotally provided with said pedal lever (15), and is provided with at least one first through hole (21);
• two adjusting tubes (30), are each secured on a front end of said sport exercise cycle, and each of said two adjusting tubes (30) axially defines a receiving channel (31) for slidably receiving a respective pedal lever support rack (20), and defines at least one second through hole (32) communicating with said receiving channel (31) and aligning with said first through hole (21) of said respective pedal lever support rack (20);
• and
• at least one insertion pin (40), in turn extends through said second through hole (32) of said adjusting tube (30), through said receiving channel (31) of said adjusting tube (30), and into said first through hole (21) of said pedal lever support rack (20).