A sleeve for assembling into a sub-assembly including a control arm of a vehicular suspension assembly prepared by a process is disclosed. The process includes the steps of: providing a tubular segment; firstly shaping a first portion of the tubular segment to include a proximal flange; secondly shaping a second portion of the tubular segment to include a distal flange. A third portion of the tubular segment forms an intermediate body extending between the proximal flange and the distal flange. The length of the tubular segment includes a substantially constant and uniform thickness after the firstly shaping step and the secondly step. A sleeve is also disclosed. A sub-assembly. A portion of a vehicular suspension assembly is also disclosed.