Ritchey Seatpost WCS Carbon Link OffsetProduct Details The WCS Carbon LINK FlexLogic post brings more compliance, increased versatility, and a lighter weight to the legendary Ritchey Two Bolt seatpost system design. This post has a 15mm offset, and the patented LINK clamp is reversable and fits all standard saddle rail designs. The carbon layup used for the Carbon LINK FlexLogic was originally developed for top level Pro Tour teams and is 15% more vertically compliant than other layups,