Seatposts

KS Ks | E20 Dropper Seatpost | Black | 30.9Mm, 125Mm Travel, 425Mm Length | Aluminum

MPN C228125309

Compatibility: reviewed

Known specifications can be used by the compatibility engine.

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Jenson USANew · Checked Sep 20, 2026, 3:23 AM

$152.10In stockVisit store

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Evidence and freshness

Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.

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Technical review: Sep 9, 2026
Compatibility review: Reviewed Sep 9, 2026

Approved technical sources

Reviewed cockpit fact at Official E20 C228 dimension tableManufacturerSource checked Sep 9, 2026Evidence reviewed Sep 9, 2026
Reviewed cockpit fact at jenson-usa catalog row 35169ManufacturerSource checked Sep 5, 2026Evidence reviewed Sep 9, 2026
Reviewed cockpit fact at Exact C228 E20 fact sheetRetailerSource checked Sep 9, 2026Evidence reviewed Sep 9, 2026

Technical data

Specifications

Seatpost diameter: 30.9 mm
Seatpost length: 425 mm
Seatpost offset: 0 mm