This Cervelo S-Series UCI Legal seatpost fits the S5 and 2014 and newer S3 and S2 frames. It is the UCI Legal version that has a 0 or 20mm offset depending on where the clamp is positioned. It is constructed for durable and reliable UD Carbon and includes a replacement seatpost head and saddle clamp as well as the proprietary plug used to seal up the other, non-utilized position of the two-position post.

When you install the saddle clamp in the front position the measurement to the end of the post is 250mm for the Small, 300mm for the Medium and 360mm for the Large. The minimum insertion line is 65mm from the end of the post.