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26.8 millimetres. It’s the diameter that anchors this aluminium seatpost inside steel frames from the era of downtube shifters and toe clips. French-made and unmistakably of its time, this post gets the fit right first time—no shims, no hassle.
Precision fit: 26.8 mm nominal diameter, matching hundreds of French and Italian frames.
Forged in France: Aluminium construction keeps weight low while retaining a sturdy feel.
Honest patina: The photos form part of the description. What you see is what you receive—a component with genuine age, no structural damage, only light surface wear from storage.
This seatpost is exactly as photographed. No cracks, bends, or major rust are present; minor cosmetic blemishes are part of its history.
If your project demands a slightly smaller diameter, a 26.6 mm aluminium seatpost from the same workshop is available. And for those mixing brands, the Spidel Simplex SLJ 26.6 mm seatpost offers a different head design that suits Peugeot PX and PY frames.
It has a 26.8 mm diameter, which fits many classic steel frames.
Yes, aluminium seatposts of this era are allowed in L’Eroica. Verify the specific rules for your bike.
Aluminium, as listed in the technical specifications.
No major defects are noted. The photos form part of the description and show the actual condition.
It is intended for vintage bicycles with a 26.8 mm seat tube. Check your frame’s internal diameter before purchase.
Data sheet
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Brand: RUBIS
Brand: MERCIER
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