The Hyperlite appears in the 1939 Claud Butler catalogue with double-butted 531 tubing, duralumin rims and ultra-light alloy hubs, alongside Sprint and three-speed Tourer versions.
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
- Double-butted 5311939 — Ebykr catalogue archive, p.15
Gears and drivetrain
- three-speed Tourer versions1939 — Ebykr catalogue archive, p.15
Wheels and tyres
- duralumin rims1939 — Ebykr catalogue archive, p.15
- ultra-light alloy hubs1939 — Ebykr catalogue archive, p.15
Catalogue appearances
| Year | Name as printed · model no. | Details | Source |
|---|---|---|---|
| 1939 | C.B. Hyperlite Model | Double-butted 531; duralumin rims; ultra-light alloy hubs; also Sprint and three-speed Tourer versions. | Ebykr catalogue archive, p.15 |
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.