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Btwin, 650cm x 28/42" Presta Valve Inner Tube

Sale price: $3.99 Regular price:

650 x 28 / 42 Presta inner tubes with 650 diameter and a cross-section ranging from 28 to 42 mm.

Color: Select a color
Size: Select a size
Sale price: $3.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8549087

Product Features

A photo of the Btwin, 650cm x 28/42" Presta Valve Inner Tube in use

Btwin, 650cm x 28/42" Presta Valve Inner Tube | kids' bike wheels, 12" in diameter with a 1.70 to 2.20 cross-section. Bent valve for easy inflating.

650 x 28 / 42 Presta inner tubes with 650 diameter and a cross-section ranging from 28 to 42 mm.


650 x 28 to 650 x 42 tires and 650 wheels with cross-sections of 28 to 42.


Optimized composition to ensure your inner tube has a good seal.

Product Customer Reviews

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Btwin, 650cm x 28/42
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Service with a smile!

Excellent in store service as usual.

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Cumpme lo esperado

Todo bien

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Me cambiaton la camara de la rueda

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Bon produit

Excellent rapport qualité/prix Je vous le recommande.

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Bien conseillée par la…

Bien conseillée par la vendeuse

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Bon rapport qualité prix

Bon rapport qualité prix

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Parfait. Rien à redire

Parfait. Rien à redire

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Conforme au besoin

Conforme au besoin

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La valve se bloque…

La valve se bloque : comme j'avais déjà eu ce problème, je savais qu'il faut d'abord la débloquer en appuyant fortement dessus avant de pouvoir la gonfler.

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Bonjour Madame,

Merci d'avoir pris le temps de déposer un avis sur la chambre à air 650.

Je vous présente mes excuses pour ce souci qui n'est absolument pas normal. Je suis content de lire que vous avez pu faire le nécessaire sans trop de désagréments et ainsi pouvoir profiter de ce produit.

Vous pouvez procéder à un échange dans votre magasin le plus proche.

Merci de votre fidélité.

Bonne journée





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Valeur sûre pour vieux…

Valeur sûre pour vieux vélo urbain que j’utilise depuis très longtemps, bien avant la mode du vélo!

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Rien a dire

Rien a dire

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Additional Product Information



  • 10% Brass
  • 90% Rubber - Isobutylene isoprene rubber - butyl

How to choose an inner tube

Check the information indicated on the sidewall of the tire (diameter and width). For example, 26 x 2.20 means your tire is 26 inches in diameter and 2.20 inches wide. On the tire sidewall, you will also find the dimensions in mm in ETRTO international units. For example, 50-559 means a tire that is 50 mm wide and has an inner diameter of 559 mm (approx. 26 x 2.00).

Removing an inner tube

Remove the old inner tube using B'Twin tire levers

Checks to carry out before installing an inner tube

Check the condition of your tire and replace it if necessary. Make sure no objects are lodged in the tire. Check the condition of your tire rim strip. A rim strip that is even slightly bent can cause punctures. Check that your rim does not have any other issues that could damage your inner tube.

Mounting the inner tube

Watch our video before you start. Pre-inflate the inner tube slightly to avoid pinching. Insert the valve, making sure you are using the correct valve for your rim. Put the inner tube entirely inside the tire so that it fits inside the rim. Take care not to pinch the inner tube when fitting.

Mounting the tire

Start mounting the tire at the valve. Finish mounting the tire at the valve to avoid pinching the inner tube. Never mount your tire with a screwdriver or a tire lever, as you risk pinching and puncturing the inner tube.

Inflating the tire

Inflate your tire carefully, to the pressure recommended by the manufacturer (visible on the tire sidewall in PSI or bars, 1 bar = 14.51 PSI). Regularly check that your tire is in the correct position as you inflate it.

Tip from the pros

To avoid punctures from pinching and for best tire performance, we recommend that you check your tires and inflate them to the suggested pressure before every ride.


5.8 oz



Product testing

To guarantee optimal quality, 100% of our inner tubes are inflated for a period of 8 hours.

Storage instructions

Carry your inner tubes in a container to protect them from getting punctured (B'Twin carry case, original packaging, etc.).

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

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual