Factor O2 VAM Axle Sizes and Rotor Limits: A Parts Identification Checklist
Factor O2 VAM axle sizes on the current page are 12x100mm front and 12x142mm rear thru-axle. A separate row gives a maximum rotor size of 160mm front and rear. These entries identify different interfaces; together they still do not specify every dimension of a replacement axle or brake installation.
Separate the two Factor O2 VAM axle sizes
The Factor O2 VAM front axle entry is 12x100mm, while the Factor O2 VAM rear axle entry is 12x142mm. Preserve which end each describes. Neither source row supplies a verified overall replacement-axle length or thread pitch, so those values cannot be reconstructed from the interface number alone.
A useful spare-parts request identifies the frame and fork generation alongside the existing axle and its markings. Retaining photographs of actual hardware for the supplier is different from treating a general bicycle photograph as proof. The historical image here illustrates the model family, without establishing any replacement part’s thread or length.
The rotor entry does not choose the complete brake system
The model specification labels Brake type as Disc and Max Rotor Size as 160mm front and rear. Factor O2 VAM rotor size is therefore a stated limit, not a complete shopping list. It does not choose an adapter, calliper, fixing-bolt length or particular wheel and rotor combination.
Factor O2 VAM disc brake limits also need to remain attached to the current record’s generation. A maximum diameter does not approve a conversion on an unidentified bicycle. This article provides no axle-installation or brake-assembly procedure and assigns no torque from an unrelated bolt.
Include the small parts in the identification question
The 2023 manual depicts dropout inserts and a nylon washer as separately identifiable components with the thru-axles. That is useful evidence that width entries are not a complete hardware inventory. Ask about the entire applicable arrangement rather than assuming an axle alone resolves missing pieces.
Use the actual offer to identify the candidate bicycle, then confirm the hardware on that specific frame and fork. The catalogue listing is Factor O2 VAM - SRAM Force w/ Power Meter Bike — Chrome.
Keep the front and rear descriptions in separate lines when contacting the supplier. A reply should identify the replacement part and applicable instructions, not merely repeat a wheel-interface width. The general brand guide supplies context for the range, without settling these hardware details. The Factor introduction provides range context alongside these hardware details in the topic directory.
FAQ
Does 12x142mm verify total replacement-axle length?
No. The source gives an interface entry, not the complete axle dimensions.
Does 160mm specify which adapter to buy?
No. The rotor limit does not identify the necessary adapter or bolts.
Does the manual depict separate dropout hardware?
Yes. Its inserts and nylon washer show why the axle entry is incomplete as a parts list.
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).
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.