Liv D-Fuse Seatpost: Read the Avail Advanced 2 Shape and Offset
The Liv D-Fuse seatpost on the US 2026 Avail Advanced 2 is identified by a proprietary D-shaped profile and a composite construction. The specification adds a 14 mm offset and a 350 mm length. Those details identify different aspects of the post; they are not three interchangeable descriptions of its size.
Liv D-Fuse seatpost: shape, offset and length
Liv’s technology description calls the post D-shaped. The build table names Giant D-Fuse composite and assigns the same 350 mm post length to XXS, XS, S, M and L. No round seatpost diameter is supplied in that entry. Copying a familiar round-post measurement from another bicycle would add information the model page has not given.
The 14 mm value is explicitly an offset. Keep that label when speaking with a parts supplier so it is not mistaken for a diameter or tightening value. Likewise, 350 mm is the listed component length, not the amount that should remain above the frame or a rider’s saddle-height setting.
A request based on “D-Fuse, 350” still leaves out useful identity. Include the composite description, offset, frame model and actual markings on the fitted assembly. A family name on its own cannot identify every replacement post or the hardware that secures it.
The saddle and fastening hardware need their own identity
The model table names a Liv Approach saddle separately. It does not publish saddle-rail dimensions, a post-clamp torque or an insertion limit alongside these entries. None of those missing specifications can be derived from the post’s overall length or its offset.
For an existing bicycle, describe whether the enquiry concerns the post, the frame fastening arrangement or the saddle attachment. Those are different locations. If there is slipping, damage or an unusual noise, have the actual assembly assessed rather than treating a new post as a diagnosis or adding tightening force without instructions.
The listing identifies Liv Avail Advanced 2 Bike — Moonstone / Gray. Its catalogue identity provides a useful starting point for obtaining the applicable part and instructions. The Liv topic and range overview supply broader context, while this post record remains specific to the cited model. The historical race-bike detail is not an installation diagram for D-Fuse hardware.
FAQ
Is 14 mm the seatpost diameter?
No. Liv labels it as offset; this entry supplies no round diameter.
Does 350 mm state the permitted exposed length?
No. It describes the component length, without giving insertion or extension instructions.
Does every listed frame size use the same post length?
The current US table assigns 350 mm to all five sizes, without establishing a personal saddle position.
Manufacturer reference: US 2026 Avail Advanced 2 specification and geometry (https://www.liv-cycling.com/us/avail-advanced-2), read 6 November 2026.
Photograph credits and permissions
Photograph 1
Original title: 2019 BLT Stramproy bike Demey.jpg
Creator: Hoebele; creator URI: https://commons.wikimedia.org/wiki/User:Hoebele
Copyright notice: Hoebele. No separate copyright notice was supplied on the file page or in the inspected EXIF.
Original source URI: https://commons.wikimedia.org/wiki/File:2019_BLT_Stramproy_bike_Demey.jpg
License / permission: CC BY-SA 4.0
License / permission URI: https://creativecommons.org/licenses/by-sa/4.0/
Modification notice: Original 2736 × 1824 JPEG retained byte-for-byte. No local cropping, resizing, recompression, retouching or metadata removal. Supplied EXIF retained; no earlier editing notice was supplied.
Source disclaimer: Historical CCC-Liv race-bicycle detail photographed at the 2019 Boels Ladies Tour, identified by its source as Valerie Demey’s bicycle. Related Liv road-bicycle context only, not the current Avail Advanced 2, its dimensions, parts, condition or performance. Photo shared without warranties under CC BY-SA 4.0; no creator, rider or team endorsement is implied.