Cinelli King Zydeco Size Chart: Why Medium Is 47 or 51
Cinelli King Zydeco size chart comparisons can produce two different Medium labels without either being a typo. The manufacturer's 2025 catalogue calls the King Zydeco II Medium 47 and the original King Medium 51. Identify the generation before translating a seller's abbreviated size into a frame choice.
Cinelli King Zydeco size chart labels belong to a generation
The King II sequence is XS (45), S (46), M (47), L (48) and XL (50). The original King's separate table starts at S (48), followed by M (51), L (53) and XL (55). The extra XS and different numbered labels make a universal “Cinelli Medium” shortcut especially unhelpful.
Keep the letter and number together when recording an advertised frame. A label of 48 can refer to the original Small or the King II Large in these records. That observation does not make those two bicycles equivalent; it demonstrates why a number without its model heading is incomplete.
Separate the label from a diagram measurement
The II's Medium row gives S1 as 469 mm and horizontal T1 as 560 mm. The original Medium row instead gives S1 as 510 mm and T1 as 550 mm. The catalogue diagram distinguishes those dimensions. A size number is therefore no substitute for reading the relevant row and the dimension being measured.
Start a comparison with the complete row, including stack and reach, rather than trying to convert 47 into another brand's 47. The published figures are frame references, not a rider-height prescription. Saddle position and cockpit equipment need their own assessment.
Match the offered option to its own documents
The catalogue listing is Cinelli KING ZYDECO 2 - GRX 2X12 Bike — DIRTY BLUES. It has XS through XL options. Its colour differs from the 2025 catalogue examples. The listing identifies the offered family and labels; it does not independently establish that every 2025 dimension applies to the present configuration.
Request the applicable geometry sheet with the generation and finish identified. The Cinelli background article explains the wider range, while the Cinelli topic keeps this specific sizing question accessible.
Size-label FAQ
Does Medium always mean 51?
No. The original King uses M (51), whereas the 2025 King II record uses M (47).
Are two frames marked 48 equivalent?
No. These records attach 48 to different letter sizes and generations, with separate geometry rows.
Does this chart select a rider's size?
No. It identifies documented frame labels and dimensions; an individual fit decision needs more information.
Source: Cinelli 2025 catalogue, pages 32–33 and 36–37 (https://www.velofollies.be/Media/ExhibitorGate/exhibitors/638688435635364196.pdf).
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