Babboe Frame Number: Where to Look and What to Record
A Babboe frame number is the starting point for identifying an individual bicycle, but it is not always in the same place or written in the same format. The manufacturer's identification page lists several locations and examples. Recording the complete marking, its position and the surrounding label is more useful than searching for one familiar prefix and stopping there.
Babboe frame number: check which location the record describes
The page identifies the front and back of the seat-tube area, the curve on the left side of the frame beneath the bottom bracket, and the area above a Mountain mid-drive mounting point. Its directions describe the bicycle from the rider's position. They are possible locations across different designs, rather than a requirement that every frame carries a number in all of them.
For a front barcode sticker, the number is beneath the barcode. The separate Mountain rear-location description names an AC prefix followed by seven digits. Keep a photograph of the whole label or stamping beside a transcription. If access would require dismantling or moving an unstable cargo bike, leave the location unresolved rather than attempting an improvised inspection.
Keep the published formats separate
Examples on the page include GB99A12345 and older numbers beginning with 11, 12 or CAK. Mountain examples include U123456789 and A123B45678. Elsewhere it describes WSP12345P from 2019 and AC1234567 from May 2020. These examples show why retaining letters and the full sequence matters.
The page's general examples and its AC location description should both remain in the record. A prefix alone does not identify the complete bicycle. Neither these examples nor a seller's abbreviated number supplies a formula for determining its manufacturing year, original components or inspection status.
Create a clear private identification note
Label each entry by location: front sticker, rear marking or bottom-bracket stamping. Copy ambiguous characters as uncertain and retain the photograph instead of silently choosing a letter or numeral. Keep the individual identifier and purchase documents private; a public photograph need not expose the full number.
Add the model name exactly as documented, together with the source of any claimed year. If two markings differ, preserve both descriptions. The manufacturer's current notice separately asks owners to retain records and correspondence, but an identification note does not establish individual safety or promise available service. Our Babboe background article explains the wider model history; the Babboe topic keeps those general descriptions separate from the identity of one frame.
FAQ
Is the bottom-bracket curve the only possible location?
No. The manufacturer lists several locations across different frame designs.
Does an AC or WSP prefix establish a complete identity?
No. Retain the full sequence and the location where it appears.
Can the example formats establish that a bicycle is cleared for use?
No. Identification and an individual inspection or safety decision are separate matters.
Sources
Frame locations and mixed identifier examples follow the complete manufacturer identification page; current record limits come from the separately cited notice. Sources checked 30 October 2026:
Babboe document 1 (https://www.babboecargobike.com/customer-service/cargo-bike-framenumber)
Babboe document 2 (https://www.babboecargobike.com/customer-service/recall-2024-and-bankruptcy)
Photograph source (https://commons.wikimedia.org/wiki/File:Babboe_Curve_at_Flying_Pigeon_LA_bike_shop_(15107108050).jpg)
Photograph credits and permissions
Photograph 1
Original title: Babboe Curve at Flying Pigeon LA bike shop
Creator: Umberto Brayj; creator URI: https://www.flickr.com/people/45152500@N00
Original source URI: https://commons.wikimedia.org/wiki/File:Babboe_Curve_at_Flying_Pigeon_LA_bike_shop_(15107108050).jpg
License / permission: CC BY 2.0 Generic
License / permission URI: https://creativecommons.org/licenses/by/2.0/
Modification notice: Original 3264 × 2448 JPEG downloaded from Wikimedia Commons and retained unchanged. No crop, resize, conversion, retouching, re-encoding or metadata removal by this publisher.