Factor O2 VAM Saddle Height: Short, Standard and Long Mast Entries
Factor O2 VAM saddle height information needs a precise reference point: the current chart labels its ranges saddle rail height. It then separates short, standard and long external masts, each with a stated offset. Those ranges cannot be treated as height from the ground or as the top surface of every saddle.
Read Factor O2 VAM saddle height with the mast label
For the size 54 column, the STD mast with 0 offset, labelled 110mm, gives 650–720. STD with 25 offset, labelled 120mm, gives 660–730. Those are two separately labelled rows. Keeping their labels attached is more useful than copying the combined outer limits and assuming one part covers everything between them.
The Factor O2 VAM short seatmast rows list 600–670 for 0 offset, labelled 60mm, and 610–680 for 25 offset, labelled 70mm. The Factor O2 VAM long seatmast entries are 690–760 for 0 offset, labelled 150mm, and 700–770 for 25 offset, labelled 160mm. These are transcribed range cells; their numeric endpoints do not carry a separate unit suffix in the captured chart.
Keep the anomalous cell visible
One nearby entry needs particular care: size 56, SHORT mast, 25 offset actually reads 680–710. Its pattern may look unexpected, but changing it to make the row more regular would invent a correction. Ask Factor to confirm that exact cell and its applicability rather than extrapolating it to another size.
The 2023 manual’s External SeatPost section tells the buyer to determine appropriate length and offset with the shop or customer-service representative. Factor O2 VAM seatmast options therefore belong in the order discussion, before any assumption about what the frame package includes.
Distinguish mast selection from conventional insertion
The Factor O2 VAM standard seatmast chart does not prove which mast accompanies a local offer. The catalogue listing is Factor O2 VAM - SRAM Force w/ Power Meter Bike — Chrome.
The older O2 Disc manual’s 90mm minimum insertion concerns a conventional post arrangement. It is not a substitute adjustment rule for the external mast chart. Bring the exact generation, saddle and intended rail-height reference to the supplier; this guide provides no cutting or fitting procedure. The Factor collection keeps mast and frame questions accessible alongside the range background.
FAQ
Are the chart ranges measured to the saddle top?
They are labelled saddle rail height, a different reference from the saddle’s upper surface.
Should the unusual size-56 cell be silently corrected?
No. Preserve its literal 680–710 entry and request confirmation.
Does the older 90mm insertion figure set the external mast range?
No. That older instruction belongs to a different post arrangement.
Sources
Manufacturer model specification (https://factorbikes.com/bikes/o2-vam) (read 5 November 2026).
O2 VAM v2 manual, cover dated 2023 (https://assets.ctfassets.net/uyc32o2uod42/4tilfMcqAd3aG2yvddQd2f/f84ba94ebf86b407a4d13200fac80c9e/New_O2_VAM__2023_.pdf) (read 5 November 2026).
O2 Disc manual: index and filename v1.06, cover V1.05 (https://assets.ctfassets.net/uyc32o2uod42/Mz8oWramV9xwT2zz4a2UF/5140e44e94fe57ce9aa7fb135362867a/Factor_O2_Disc_Assembly_Manual_v1.06.pdf) (read 5 November 2026).
Photograph credits and permissions
Photograph 1
Original title: Factor O2 VAM Disc
Creator: Glory Cycles; creator URI: https://www.flickr.com/photos/glorycycles/
Original source URI: https://www.flickr.com/photos/glorycycles/48745876337/
License / permission: CC BY 2.0 Generic
License / permission URI: https://creativecommons.org/licenses/by/2.0/
Modification notice: Original downloaded JPEG bytes retained without crop, recompression or colour edits. EXIF and XMP retained, including embedded Artist/creator value Picasa and the supplied modification metadata. Earlier source processing is unassessed.
Source disclaimer: Historical source-identified Factor O2 VAM Disc, with externally visible cables and a conventional seatpost. Photograph/upload dates do not establish bicycle production year. Related model history only: not the current v2 external-seatmast design, the linked Chrome SRAM Force package, or proof of current specifications, fit, condition or compatibility. No endorsement or warranty is implied; other rights may apply.