Part of the COMFORT CONCEPT with SILKCARBON fully carbon frame & fork set: the 27.2mm carbon seat post Simplon CARBON ROD VT. The 200g light seat post isn't just extremely stable, but also yields a noticeable bit vertically thanks to VIBREX technology. In the system with the thin seat and top tube and VIBREX seat stays the unique ride comfort of the SILKCARBON is born.