Pure Cycles Original seatpost: 25.4 mm post and 28.6 mm clamp
The Pure Cycles Original seatpost entry is 25.4 × 300 mm, while its separate seat-clamp entry gives 28.6 mm I.D. Those numbers concern different pieces of the saddle assembly. Distinguish them before describing a missing part or asking a supplier about an existing bicycle.
Keep the Pure Cycles Original seatpost and frame clamp separate
The detailed 671003 sheet describes an alloy post with an integrated clamp and the dimensions 25.4 × 300 mm. Its next Seat Clamp line specifies alloy, 28.6 mm inner diameter, with a bolt. A request for “the 28.6 post” would merge two different source entries.
The integrated clamp in the post description is also not a reason to ignore the separately listed frame clamp. Keep the complete component names in the enquiry. This avoids relying on a single diameter without saying whether the question concerns the post or the surrounding clamp.
Identify the saddle and the frame measurement too
The saddle is listed as Pure Cycles Urban with steel rails. Its name and rail description provide another separate identifier. They do not supply a rail-clamping procedure, an adjustment range or a compatible replacement saddle recommendation.
Seat Tube, Center To Top belongs to the geometry chart, with columns from 47 cm through 64 cm. That frame dimension is not the 300 mm post entry. It also cannot establish how much post is exposed on an individual assembled bicycle or a permissible insertion position.
Make the parts question specific to the bicycle
The local reference is Pure Cycles Original Bike — Juliet. Describe the actual part under discussion and include its markings, rather than treating these catalogue numbers as a complete replacement specification. The sheet reserves changes to specifications, colors and materials.
The white comparison photograph shows a saddle, an exposed post and the frame junction below it. These visible locations explain the distinction between assemblies; no diameter, insertion depth or torque has been measured from the photograph. The Pure Cycles introduction supplies background beyond these particular parts.
FAQ: separating the saddle-assembly records
Does the sheet call the seatpost 28.6 mm?
No. It lists 25.4 × 300 mm for the post and 28.6 mm I.D. for the separate clamp.
Is seat-tube frame size the same as post length?
No. The geometry chart and the seatpost specification describe different components and measurements.
Does the source provide a clamp torque here?
No. The cited component entries do not supply a tightening torque or installation procedure.
Explore the Pure Cycles model topic with each component clearly named.
Manufacturer references: Original 671003 specification (https://www.purecycles.com/pages/original-specs-671003); Original product and geometry (https://www.purecycles.com/products/original-21154).
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