Shock-absorbing seat stay for bicycle

A shock-absorbing seat stay for connection with a seat tube of a bicycle, the shock-absorbing seat stay comprising:

• a seat tube coupler made of fiber reinforced material and having a coupling portion and two branches, the coupling portion having a first end and a second end, the first end being adapted for connection with the seat tube of the bicycle, the two branches integrally extending from the second end and each having a first joint portion, each of the first joint portions having at least one first through hole;
• two extended parts made of fiber reinforced material and each having a second joint portion corresponding to one of the first joint portions, each of the second joint portions having at least one second through hole;
• two shock-absorption members made of elastic material and held between the corresponsive first and second joint portions, each of the shock-absorption members having at least one third through hole, each of the first through holes being in alignment with one of the second through holes and one of the third through holes;
• and
• at least two fastener units each inserted through one of the first through holes, the corresponsive second through hole and the corresponsive third through hole to interconnect the corresponsive first joint portion, second joint portion, and shock-absorption member, each of the at least two fastener units having a screw bolt and a screw nut.