Co-op Cycles ADV 2.1 Axles: Separate Hub Spacing from Axle Diameter

2026-11-06

Co-op Cycles ADV 2.1 axles are listed at 12 mm front and rear in the saved item 254161 features. The hub table then distinguishes 100 x 12 mm at the front from 142 x 12 mm at the rear. Preserve the wheel position and both dimensions when describing the recorded interfaces.

Yellow Co-op drop-bar bicycle with rigid fork and disc brakes beside parked cars — Historical yellow Co-op ADV-family bicycle, photographed beside parked cars. Exact model and manufacturing year are unverified; this is not a photograph of the ADV 2.1 item 254161 configuration. Matthew Bellemare, New Bike Day; CC BY-SA 2.0. Original source-hosted JPEG unchanged. Photograph source (https://www.flickr.com/photos/bellemarematt/54472185594/); Matthew Bellemare (https://www.flickr.com/people/bellemarematt/); CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/).

Record the Co-op Cycles ADV 2.1 axles with their hubs

The front hub entry is Formula, 100 x 12 mm thru, thirty-two holes and six-bolt. The rear is Formula, 142 x 12 mm thru, thirty-two holes and six-bolt. The shared diameter does not make the front and rear records identical. A comparison note should give each wheel its own line.

In these interface descriptions, the 100 and 142 figures belong to the hub-spacing record. They are not published overall replacement-axle lengths. The source does not provide axle thread pitch, a threaded-section length or a complete spare-axle part number.

Distinguish hole count from wheel diameter

The WTB ST i21 TCS 2.0 rim entry is also thirty-two-hole. That count is a separate descriptor from the wheel-size field, which says 700c. The rim's own row uses the combined 29 in./700c wording. Neither label gives a spoke length, so no such length can be calculated from this record alone.

Six-bolt belongs with the rotor-interface description. It should not replace the axle dimensions in a wheel enquiry. A buyer comparing a replacement wheel needs the relevant hub, braking and bicycle requirements considered together; this article does not approve a different wheel assembly.

Keep the actual bicycle in the enquiry

For an existing bike, note the installed hub identifiers and any known wheel or fork replacement. Distinguish what is visibly fitted from what this saved list records. If the question concerns a missing axle, ask for the applicable complete part identification instead of ordering from the hub spacing alone.

The yellow historical image cannot reveal a thread specification. Consult the Co-op bicycle topic and family overview when separating other ADV generations from item 254161.

FAQ

Do both positions use a listed 12 mm diameter?

Yes, but their front and rear hub-spacing figures differ.

Is 142 mm a complete replacement-axle length?

No. The cited rear-hub entry does not establish that length.

Does thirty-two-hole specify the spoke length?

No. Hole count and spoke length are different records.

Sources

Manufacturer record saved 4 November 2026; reread 6 November: ADV 2.1 item 254161 (https://www.rei.com/product/254161/co-op-cycles-adv-21-bike).

Photograph credits and permissions

Photograph 1

Original title: New Bike Day

Creator: Matthew Bellemare (bellemarematt); creator profile: https://www.flickr.com/people/bellemarematt/

Original source URI: https://www.flickr.com/photos/bellemarematt/54472185594/

License / permission: CC BY-SA 2.0

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

Modification notice: Original source-hosted JPEG retained byte for byte for this article. Source-described earlier photographic process: Nikon N80 | Nikon AF Nikkor 28mm f/2.8D | Kodak Vision3 500T @ 800 Digitized with Sony a7R III & FE 90mm f/2.8 Macro G OSS | CineStill CS-LITE | Valoi 360 135 Holder Home developed in Fujifilm Negacolor | 4:18/35C | Paterson Tank, AGO Film Processor Negative Lab Pro v3.0.2 | Color Model: Basic | Pre-Sat: 3 | Tone Profile: Linear Deep | WB: Auto-Neutral | LUT: None Embedded XMP additionally records conversion from Sony ARW to TIFF and TIFF to JPEG, with Adobe Photoshop Lightroom Classic 14.2 (Windows) saves on 22 April 2025 at 12:07:50 and 17:11:39 -04:00. It records exposure +0.14, whites +11, incremental temperature +2 and tint -6; distortion, lateral chromatic-aberration and vignette correction already applied. Crop angle is 0 and HasCrop is false. These are source metadata statements, not alterations made here.

Source disclaimer: No endorsement by the photographer, REI or Co-op Cycles is implied. No warranties are given; other rights may apply. The depicted bicycle is dated photographic family context, not proof of the current ADV 2.1 specification, manufacturing year, maximum load or fit. Share adaptations of the photograph under the applicable ShareAlike terms.