The Cyclone is in the 1952 Holdsworth catalogue in 531 or Kromo, with 73° head and 71° seat angles. A Cyclone Ladies diamond frame was listed alongside it.
Known components
Listed exactly as our confirmed sources give them, with the year and source for each. A part listed for one year or version may not apply to every bike, so check against yours.
Frame and fork
- 531 or Kromo1952 — Ebykr catalogue archive, pp.2–4
Catalogue appearances
| Year | Name as printed · model no. | Details | Source |
|---|---|---|---|
| 1952 | CYCLONE | 73° head, 71° seat; 531 or Kromo; a Cyclone Ladies diamond frame was also listed. | Ebykr catalogue archive, pp.2–4 |
Specs are as printed in the catalogue. Years are when the model appears in a source, not exact production dates.
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Sources
Last updated 19 October 2026. Every fact on this page comes from one of these.