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Btwin 34.9 mm Seat Clamp

Sale price: $8.99 Regular price:

34.9 mm quick-release seat clamp.

Color: Select a color
Size: Select a size
Sale price: $8.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 3640502

Product Features

A photo of the Btwin 34.9 mm Seat Clamp in use

Btwin 34.9 mm Seat Clamp is designed for tightening your seat post on a 31.8 mm frame and seat post without the need for tools.

34.9 mm quick-release seat clamp.


For 31.8 mm frames and seat posts.

Easy to use

No-tool adjustment/removal of seat post.


6061 aluminum and SCM435 steel seat clamp.


1.3 oz.

Product Customer Reviews

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142 Reviews
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Btwin 34.9 mm Seat Clamp,black
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Does the job

It does the job, but it's not terribly pretty to look at. A rather agricultural finish and uninspiring colour choice

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Good product

This product is working very well

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Perfect Fit

Excellent fits perfectly... Superb build quality and lightest clamp i have found till now in the whole market... finally found one... Great work decathlon...✌

Falsche/Verwirrende Größenangaben

"Geeignet für Rahmen mit 31.8mm" ...bei 31.8mm Außenrohrdurchmesser hat das Teil noch gute 3-4mm Platz und lässt sich absolut nicht befestigen. Produktinformationen daher leider sehr irreführend bzw falsch. Rücksendung veranlasst.

Tut was er soll.

Funktioniert wie gewünscht, und das zu einem günstigen Preis.

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Gute Qualität

Die Qualität des Schnellspanners ist gut! Gut gefallen hat mir das die Klemmschraube mit + / - gekennzeichnet ist. Mein Sohn kann dardurch direkt sehen ob er die Klemmkraft erhöht, oder verringert! Das Preis Leistungsverhältnis ist super. Schön wäre aber gewesen wenn es den Spanner auch, oder nur in schwarz gegeben hätte!

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Perfectamente asesorado por personal de tienda.

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Caro y se puede mejorar

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Cómodo y fácil de ajustar

Cómodo de ajustar Único defecto el color

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Compré esta abrazadera como sustituto de la original de la Triban 500,y resultó perfecta, incluso mucho mas práctica.

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Aceptable, cumple su misión.

cumple su misión, la rosca permite ajustarlo con precisión, pero te da la sensación de que no es muy resistente, aunque por ahora no he tenido ningún problema. Puede que sea solo un tema de percepción al haber usado otras que se me han roto.

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Relacion calidad precio

Lo vi por la pagina, vi que estaba disponible y fui a por la pieza.

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Collier pour remplacer celui…

Collier pour remplacer celui d'origine sur VTT.

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Additional Product Information


Main fabric

  • 100% Aluminum



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual