The Ritchey WCS seatpost has long been a mainstay here. It has tons of setback -- as much as you'll find on any post. And its two-bolt head provides security for even the biggest riders on the roughest of roads. By introducing the identical design in a carbon version, Ritchey offers the same quality at a lighter weight in the Ritchey WCS Carbon seatpost: About 44g in weight savings in comparison to the standard alloy WCS post. ~170g for the 27.2mm version, and ~210g for the 31.6mm.