LE SIMPLEX "suicide" front derailleur SGDG vintage 1950s rare

Dating from the 1950s, this LE SIMPLEX "suicide" front derailleur carries the SGDG marking. Its rarity speaks to a very specific period of French bicycle component design. The mechanism's design predates the parallelogram geometry that later became standard, and it offers a direct view of how front shifting was first engineered.

Condition and Documentation

As a used component, its present condition is documented in the accompanying photographs. These images record the surface wear, finish, and any signs of age. They are integral to evaluating the item; a close look at them tells the story of its previous life and storage.

Compatibility Context

A front derailleur of this era suits early drivetrain layouts. When planning to fit it, consider the seat tube diameter, chainring size, and the intended shift lever. It belongs to the world of vintage restoration, where the priority is period-correct engineering over modern convenience. For other early drivetrain parts, the Derailleurs category offers related components from the same lineage.

Those working on a complete period-correct build may also find a compatible SIMPLEX vintage gear shifter useful for matching the control lever to this mechanism.