Raleigh One Seatpost: Separate 31.6 mm Diameter from 350 mm Length

Raleigh One seatpost dimensions appear together in one component entry: Kalloy Non Suspension SP-320, diameter 31.6 mm, length 350 mm. Keeping the names and units attached answers a common reading mistake. The larger number describes the post's listed length, rather than the diameter entering the frame.

Read the Raleigh One seatpost as a named component

SP-320 is the Kalloy component identifier supplied by the saved HIGH record. Non Suspension is also part of that description. A request that says only “Raleigh suspension post” would therefore change, rather than repeat, the published component identification.

The 31.6 mm diameter and 350 mm length should occupy separate lines in a comparison note. They describe the same listed post in different ways. Neither number provides a saddle-height setting, a seat-collar diameter or the amount of post permitted above the frame.

Keep the frame and saddle entries separate

The HIGH frame is labelled One Size 58 cm. That is a frame-size label, not another seatpost dimension. It cannot be substituted for the 350 mm component length, and the post's diameter cannot establish which frame format someone is viewing.

The saddle entry names Velo Tour VL-3625. Retaining that model beside the post identifier makes the contact-point record more complete, but it does not specify every saddle-rail or clamp interface. A familiar saddle name is not a measured comfort result or approval for an alternative assembly.

Ask about the actual post before changing it

The Raleigh One - Smart Bike — Sage Grey listing identifies the local One model. For an existing bicycle, include any readable markings on the fitted post and known replacement history when asking about SP-320. The saved equipment list cannot establish whether a previous owner retained that part.

Seek the applicable frame and component requirements for a replacement or adjustment. The cited entry provides no insertion-depth range, maximum exposed length or clamping torque. The Raleigh family guide gives broader context; the model directory keeps this specific dimensional question with the One.

FAQ: three different kinds of dimension

Is 350 mm the post diameter?

No. The entry lists 350 mm length and 31.6 mm diameter.

Does Non Suspension describe a suspension seatpost?

No. It is the source's explicit description of the named SP-320 post.

Can the 58 cm frame label set the saddle height?

No. It supplies no rider-specific saddle-position or post-extension instruction.

Sources

• Raleigh One HIGH record (https://raleigh.co.uk/en-int/products/one-vtas1).
• Saved source records reread 6 November 2026; component substitution and model-specific limits remain applicable.

Photograph credits and permissions

Photograph 1

Original title: Raleigh Twenty

Creator: Richard Webb (Fasgadh); creator URI: https://www.geograph.org.uk/profile/196

Copyright notice: © Copyright Richard Webb.

Original source URI: https://www.geograph.org.uk/photo/7644420

License / permission: CC BY-SA 2.0

License / permission URI: https://creativecommons.org/licenses/by-sa/2.0/

Modification notice: Source-provided 640 × 640 grayscale JPEG web rendition retained byte for byte. No local crop, resize, recompression, colour changes or metadata removal. The delivered file contains JFIF metadata and no EXIF, XMP or ICC segment. Earlier source processing is unassessed; this is not claimed to be the camera original.

Source disclaimer: Historical Raleigh Twenty bicycle photographed outside Planet A Boutique, Easter Road, Edinburgh, on 3 November 2023, as identified by its source. Exact manufacturing year, condition and parts remain unverified. Related Raleigh brand context only, not a current One, Novus, Motus, Hockley or Pop model, electrical system, fit or load approval. No endorsement or warranties are implied; other rights may apply. Adaptations of the photograph remain subject to the applicable ShareAlike terms.