State Bicycle Co. 4130 Road v2 Seatpost: Keep Post Dimensions Separate from the Clamp Record
The State Bicycle Co. 4130 Road v2 seatpost record gives a 27.2mm diameter and 350mm length, with a separate 29.8mm seat-clamp entry. Keep the post and clamp fields apart. These published dimensions help identify the recorded equipment but do not prescribe saddle height, exposed-post length or an individual riding position.
Read the State Bicycle Co. 4130 Road v2 seatpost dimensions
The PDF’s detailed seatpost section names aluminum, 27.2mm diameter and 350mm length. The product page likewise lists an SBC aluminum post at 27.2mm x 350mm. Preserve the diameter and length labels when comparing a component marking or asking which assembly belongs to a particular bicycle.
The 350mm figure is a published component length, not a statement of how much post should remain visible. The cited entries do not give minimum insertion, maximum extension or a rider-specific saddle-height calculation. Subtracting another dimension from 350mm would not supply those missing instructions.
A clamp diameter is a separate entry
The State Bicycle Co. 4130 Road v2 seat clamp is listed at 29.8mm in the PDF, with aluminum material wording. That is not an alternative seatpost diameter. A comparison note that puts both 27.2 and 29.8 under “post size” would hide the component distinction that the source actually makes.
The clamp section also prints the bolt-type label M5 x .80mm x 20mm. Quote it as the document’s identification record. It supplies neither a tightening torque nor approval for an unspecified replacement bolt or clamp. The label should not be expanded into an installation procedure.
The existing Black & Tan Road v2 listing anchors these entries to a particular model record. An actual bicycle may still need its installed post and clamp identified separately. The catalogue listing is State Bicycle Co. 4130 Road v2 - Black & Tan - (8-Speed).
Keep the saddle description with the saddle
The PDF names a polyurethane saddle with steel rails. That is a different component from the aluminum post and clamp. The description does not establish every saddle or rail assembly that may be substituted, and it is not a comfort test or fitting assessment.
The historical Contender owner photograph shows separate State brand context. Its saddle position and visible post cannot establish the dimensions, insertion limits or condition of a Road v2 being considered. Use the published entries to ask a precise identification question, with the actual bicycle’s markings alongside them.
The existing State pages cover wider family background beyond this post-and-clamp distinction. State Bicycle Co. topic; existing State introduction.
FAQ
Is 29.8mm the listed seatpost diameter?
No. That is the separate seat-clamp entry.
Does 350mm specify exposed-post length?
No. It is the component’s listed length.
Does the bolt label include tightening torque?
No. The cited clamp entry gives no torque value.
Sources
Manufacturer Road v2 specification PDF (https://cdn.shopify.com/s/files/1/0232/3305/files/2026-4130-Road-SizeSpec-FixedHeight.pdf?v=1791313727).
Photograph credits and permissions
Photograph 1
Original title: IMG_6798
Creator: pstmn; creator URI: https://www.flickr.com/photos/post_man
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Original source URI: https://www.flickr.com/photos/post_man/16587024389/
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Source disclaimer: Historical State Contender owner build as described by the source, with custom wheels and hubs; Walter is the owner, not the credited photographer. Related State Bicycle Co. context only, not a photograph of current Road v2 Black & Tan or proof of its colour, dimensions, parts, material, condition, fit or compatibility. Capture and upload dates do not establish bicycle model year. Exact licence: Creative Commons Attribution 2.0 Generic. No endorsement or warranties are implied; other rights may apply. The unchanged photograph remains under CC BY 2.0; no additional restrictions are imposed.