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Measuring 26.6 mm across the shaft, this Campagnolo seatpost belongs to the Italian component lineage that outfitted Colnago and Bianchi frames through the classic era. Aluminium construction keeps the piece in the weight class expected of period builds, and the diameter places it squarely in the range needed by several steel road frames from that generation.
Seatpost sizing is unforgiving: a 26.6 mm shaft either slots into the seat tube or it does not. This post answers the call for frames pressed with that exact internal measurement, sparing the restorer the compromise of shimming or reaming. The 26.6 mm figure is the reference to check first against the frame's seat tube.
The photos form part of the description and document what is present on the item.
Colnago and Bianchi frames of the classic period are the natural partners here, and the post suits the requirements of an Eroica build where period-correct components are the whole point. If the seat tube measures 26.6 mm internally, this is the size to look for.
It measures 26.6 mm. That is the figure to match against the internal seat tube measurement of your frame before fitting.
Classic Colnago and Bianchi road frames from the period are the natural match. The 26.6 mm diameter appears on several steel frames of that era, so it is worth verifying your seat tube first.
It is aluminium. The material keeps the component in the weight class expected of period-correct builds.
Yes, it is aimed at period-correct classic road bikes. Its 26.6 mm diameter and aluminium construction suit Eroica-style builds where authenticity matters.
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Brand: RUBIS
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