Abstract: A bicycle seat post clamping assembly is formed from a simple tube attached perpendicularly to the top of a seat post. A clamping member is formed from a cylindrical member which is separated into three portions by two cuts, each of which runs from one end of the cylindrical piece to the circumference adjacent the center. Grooves in the main portion accommodate the rails of the seats and a fastening member serves to draw the three pieces together thus wedging them into the tube attached to the top of the seat post thereby allowing ease of adjustment of the angle of the seat as well as the fore and aft positioning thereof.

Abstract: A dropout member for bicycle frames is designed to cause an easily replaceble part to separate under stresses which would normally be sufficient to cause bending or other damage to the bicycle frame itself. A relatively lightweight piece of material is bolted, riveted, adhesively bonded or otherwise fastened to the main portion of the dropout such that a torque or bending moment placed upon the derailleur plate serves to fracture or bend the derailleur plate or disengage the attaching mechanism.

Abstract: A dropout member for bicycle frames is designed to cause an easily replaceable part to separate under stresses which would normally be sufficient to cause bending or other damage to the bicycle frame itself. A relatively lightweight piece of material is bolted, riveted, adhesively bonded or otherwise fastened to the main portion of the dropout such that a torque or bending moment placed upon the derailleur plate serves to fracture or bend the derailleur plate or disengage the attaching mechanism.