A torsion beam suspension capable of preventing a rapid change in rigidity at a connection portion between a trailing arm and a torsion beam is provided.

The present invention is a torsion beam suspension 100 including an upper member 10 and a lower member 20, and including right and left trailing arms 50 configured to include a pair of trailing arm configuration members 11 and the pair of lower members and configured to extend in a longitudinal, direction of a vehicle body and to be swingable in a vertical direction and a torsion beam 16 which is disposed between the right and left trailing arm configuration members the upper member 10. The lower member includes an upper connection 21 and a beam joint portion 22 inclined from the upper connection 21 to a bottom portion of the U-shaped cross section of the torsion beam and joined with the torsion beam.

A fabricated torque arm for use in a vehicle suspension, including a rod having a solid rectangular cross-section, the rod having a first end and an oppositely disposed second end, a first bushing hub, and wherein the rod is only a single piece cut from a metal plate or sheet, wherein the first bushing hub comprises cut tubing, wherein the first end of the rod has a radius that conforms to an outer surface of the first bushing hub, and wherein the first end of the rod is welded to the outer surface of the first bushing hub.

A stabilizer bar link includes a hollow rod, an insert part mounted inside the rod, and a socket into which the rod is inserted and mounted, the socket having an outer surface coupled to the rod.