Bombtrack Hook Seatpost: Diameter, Length and Clamp Records
Bombtrack Hook seatpost information changes at XL in a way that a diameter-only search misses. The saved specification gives a 27.2 mm Beech post throughout, but a 315 mm length for XS through Large and 415 mm for XL. Identify the frame-size group before treating two posts with the same diameter as the same listed component.
Bombtrack Hook seatpost lengths divide at XL
The component list explicitly places the longer post beside XL. The separate technical section repeats XS–L at 315 mm and XL at 415 mm. That agreement is more useful than assuming a smooth length increase through every frame size. Medium and Large remain in the shorter group in this particular record.
These are lengths of the supplied components, rather than dimensions of the frame or a saddle-height chart. The source does not say how much of either post may remain exposed. Its longer XL entry therefore cannot be converted into an extra permitted extension or a recommendation for a taller rider.
Offset and clamp size add different information
The technical table lists 24 mm seatpost offset. It separately gives 29.8 mm for the Origin seat clamp. Keep both labels when comparing a post or collar: the clamp figure is not an alternative to the post’s 27.2 mm diameter, and offset is not another post length.
The saddle entry names Seido Comp without a rail or clamp-interface specification. That leaves another detail to identify when considering a different saddle assembly. Neither the shared brand name nor a photograph of a saddle supplies all the requirements for a proposed replacement.
Keep a size-specific record for the actual bicycle
The catalogue listing is Bombtrack Hook Bike — Metallic Black. Its five configuration labels let a supplier connect the question to XS, S, M, L or XL. Add the markings from the fitted post if an individual bicycle has been changed, rather than assuming the saved build still describes it.
The old Hook 2 MY19 photograph is useful historical context, but its visible post position is not a measurement of the specified Beech component or an insertion instruction. The saved source gives no clamping torque, shim arrangement or dropper-post approval. Those remain separate questions for the identified frame and component.
The Bombtrack range background explains the gravel family; the brand topic keeps these component records together without replacing the XL qualification.
FAQ
Which size receives the published 415 mm post?
XL is the only size assigned that length.
Does Large belong to the 415 mm group?
No. The saved table groups Large with XS through Medium at 315 mm.
Can the post length determine its permitted exposed portion?
No. The record supplies no such adjustment limit.
Sources
The component and technical tables agree on the XL-only 415 mm post and the shorter XS–L group. See the manufacturer’s saved steel Hook record (https://bombtrack.com/products/bombtrack-hook), captured 26 October 2026 and reread 5 November 2026.
Photograph credits and permissions
Photograph 1
Original title: Bombtrack Hook 2 MY19
Creator: www.velo-radsport.de; creator URI: https://www.flickr.com/photos/velo-radsport/
Copyright notice: Embedded sRGB ICC profile notice: Copyright (c) 1998 Hewlett-Packard Company. This identifies the colour profile, not the photograph author; no separate photographer copyright notice was supplied in the inspected image metadata.
Original source URI: https://www.flickr.com/photos/velo-radsport/47821053362/
License / permission: CC BY-SA 2.0 Generic
License / permission URI: https://creativecommons.org/licenses/by-sa/2.0/
Modification notice: Source-offered 2600 × 1733 original JPEG retained byte for byte with EXIF, IPTC/Photoshop resources, XMP and ICC profile. No local crop, resize, recompression, colour edit or metadata removal. Source EXIF/XMP records Adobe Photoshop Elements 15.0 processing before retrieval.
Source disclaimer: Historical Bombtrack Hook 2 MY19 photograph; MY19 is supplied in the source title, not inferred from upload date. Related Bombtrack brand context only; not proof of the current named build, SKU colour, components, geometry, fit, compatibility, cargo capacity or condition. No endorsement is implied. CC BY-SA 2.0 applies to the unchanged photograph; retain attribution and notices, provide the license URI, and make adaptations available under an applicable share-alike license. No additional restrictions or warranties are implied; other rights may apply. Exact license name: Creative Commons Attribution-ShareAlike 2.0 Generic.