Cinelli King Zydeco Bottom Bracket: 41 mm and 46 mm Shell Records
Cinelli King Zydeco bottom bracket specifications share an 86.5 mm width but differ in their other stated shell dimension. The 2025 King II lists Press Fit 86.5×41 mm; the original King lists BB386EVO 86.5×46 mm. Retaining both numbers prevents a shared width from hiding a different frame interface.
Cinelli King Zydeco bottom bracket rows are generation-specific
The II headline abbreviates its standard to BB 86.5, while the original's headline uses BB 386. The fuller frame-specification entries provide the dimensions needed to understand those short labels. Read the detailed row before turning either headline into a component order.
Both frames are described as Columbus Carbon Monocoque. That common material description does not make their bottom-bracket interfaces the same. Frame construction, shell dimensions and the bearing assembly actually fitted are different pieces of information.
Keep crank identification alongside the shell
The II's GRX 820 two-by assembly column names an RX820 crankset with 48/31-tooth rings. The original Ultegra column lists R8000 with 46/36 rings, and its Apex column lists a DUB Wide 40-tooth crank. Each belongs to a particular build record rather than a universal King crank specification.
These examples help identify which published assembly a seller is describing. They do not select a bearing unit for every possible crank or establish a conversion kit between the two shells. A proposed crank change needs its complete component identity and applicable instructions, not just tooth counts.
A useful request distinguishes frame from installed parts
The catalogue listing is Cinelli KING ZYDECO 2 - GRX 2X12 Bike — DIRTY BLUES. Use that identity when requesting the frame's applicable current technical sheet and the fitted bottom-bracket reference. The older catalogue's colour and equipment examples do not independently authenticate the parts in the present listing.
For an existing bicycle, retain the installed crank and bearing markings with any service history. Ask for a supported complete assembly. This comparison supplies no removal method, pressing force, adapter recommendation or torque value. The Cinelli overview and topic directory provide navigation while this enquiry stays specific to the crank-bearing interface.
Bottom-bracket FAQ
Is 86.5 mm enough to identify the shell?
No. The cited II and original records share that width but list 41 and 46 mm respectively.
Does BB 386 mean the same as BB 86.5 here?
They are separate catalogue abbreviations; consult the complete generation-specific dimensions instead of merging the labels.
Do the ring sizes establish a replacement crank?
No. The exact crank, bearing assembly and frame requirements must be checked together.
Source: Cinelli 2025 catalogue, pages 32–33 and 36–37 (https://www.velofollies.be/Media/ExhibitorGate/exhibitors/638688435635364196.pdf).
Photograph credits and permissions
Photograph 1
Original title: Cinelli King Zydeco Gravel Bike
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Original source URI: https://www.flickr.com/photos/glorycycles/48918009712/
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