Co-op Cycles ADV 2.1 Gearing: Read the Saved 40T and 1x10 Package

2026-11-06

Co-op Cycles ADV 2.1 gearing in the saved REI item 254161 record combines a 40-tooth front chainring with a ten-speed 11–48T cassette. That identifies a particular one-by drivetrain, rather than every bicycle advertised under the ADV name. For a used example, begin by comparing component markings with the record.

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/).

Read the Co-op Cycles ADV 2.1 gearing as a complete set

The crankset entry names ProWheel, 10-speed and 40T. Its arm length is described as size-specific, without a numerical length in that row. Forty is the chainring's tooth count; it is not a crank length or a count of rear gears. Keep those labels together in a comparison note.

At the back, REI names a microSHIFT Advent X CS-H104 cassette, ten-speed, 11–48T. The two endpoints describe sprocket tooth counts. They do not describe an eleven-speed transmission. The listed ten rear positions accompany the single front ring described in the features.

Keep the Sword model codes with the cassette

The shifter entry is microSHIFT Sword Drop Bar Shifters SB-G7000-R. The rear derailleur is Sword RD-G7005M with a clutch. Its row additionally prints a maximum-sprocket range of 42–48T and total capacity of 37T. Those are separately labelled component figures, not permission to combine any cassette bearing a similar number.

A seller's description of “Sword gears” leaves more unresolved than the complete list does. Ask for the installed shifter, derailleur, cassette and crank identifiers. A replaced component may explain a difference, but the saved equipment list cannot inspect adjustment, wear or a proposed upgrade.

Recognise an older ADV photograph

The yellow bicycle shown here has an apparent two-chainring arrangement. Its source tags suggest an ADV-family bicycle, while its exact model remains unverified. It cannot demonstrate the single-ring package recorded for item 254161. The Co-op family introduction explains the broader range; this ADV reference topic keeps the component enquiry attached to the brand.

FAQ

Does 11–48 mean eleven rear speeds?

No. It gives the smallest and largest sprocket tooth counts.

Is 40T the crank-arm length?

No. The recorded crank length is size-specific and unnumbered here.

Does this list approve a different cassette?

No. It identifies the saved configuration without authorising substitutions.

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.