SIMPLEX Rear Derailleur Vintage Peugeot Mercier Gitane DAR14

SIMPLEX DAR14: a period-correct rear derailleur for French classics

The DAR14 sits in that lineage: a rear derailleur built around a steel and plastic construction, catalogued here with no oxidation (Oxydation: Non) and identified as a French-made part.

This is a used component intended for restoration or replacement on a vintage machine. The photos supplied with this listing are part of the description and document the item as it stands, including its cosmetic condition. One structural defect is present and must be noted: a crack at the derailleur locking screw is visible in photo 6. Aside from that point, the part presents the expected cosmetic marks and micro-scratches associated with long storage — nothing beyond what is documented here.

Why the DAR14 matters on a French build

Simplex derailleurs were fitted as original equipment on a huge number of French frames, which makes the DAR14 a natural candidate when a Peugeot, Mercier or Gitane arrives on the workbench with its original drivetrain missing or damaged. Matching the rear derailleur to the frame's era and nationality is one of the small details that separates a coherent restoration from a parts-bin assembly, and Eroica-style events tend to reward that coherence.

• Steel and plastic construction, consistent with the material used on this reference.
• No oxidation reported — the part has not been flagged for rust or oxidation.
• French origin — a domestic component suited to French frames of the same period.
• Documented defect: crack at the locking screw, detailed in photo 6.

If you are hunting for other period drivetrain parts, browse our spare parts section, where Simplex and Huret components are grouped by type and era.

Condition notes and what to expect

The item is sold as a used vintage part. Two things are worth stating plainly. First, the crack at the derailleur locking screw is a real defect and is shown in photo 6; it is not a cosmetic issue and should be taken into account before fitting. Second, no oxidation is reported, which means the surfaces have not been flagged for rust or oxide build-up. The rest of the condition is what you would expect from decades-old stock: light cosmetic marks and micro-scratches from storage and previous use. Nothing else is being claimed beyond what appears in the photos and the technical details below.

Restorers working on French bikes often pair a Simplex rear derailleur with matching cockpit and transmission parts. If you are sourcing a rear derailleur for a 1960s French frame, our 1960s Simplex rear derailleur for Peugeot is another reference worth comparing. For a slightly later Simplex build, the SIMPLEX SUPER LJ SLJ PX PY is a common match on Mercier and Gitane frames.

Key specifications

• Country of origin: FRANCE
• Oxidation: No
• Material: Steel / Plastic
• Manufacturer part number: 0000
• Category: Rear Derailleurs

All measurements, codes and values above are reproduced exactly as recorded in the listing data.

Fitting it into a restoration project

A rear derailleur rarely travels alone: cables, guides and housing usually need replacing at the same time. Our Simplex vintage gear cable guide is the type of small hardware that keeps a Simplex drivetrain consistent. And if the frame also needs a chainset to complete the transmission, the Peugeot 46T vintage chainset is a French-thread option that fits the same restoration logic.

For a wider view of components by function, the wheels and components category gathers tyres, tubes and related parts, while chainsets covers the cranksets that pair with Simplex drivetrains.

One final reminder on this specific unit: the crack at the locking screw is the single significant defect and is visible in photo 6. Everything else is consistent with a used, stored vintage part.