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Btwin 650c, x 18/25" Presta Inner Tube

Sale price: $3.99 Regular price:

650x18 to 650x25 inner tube for 650 wheels and tires.

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

Free shipping over $49

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Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8549101

Product Features

A photo of the Btwin 650c, x 18/25" Presta Inner Tube in use

Btwin 650c, x 18/25" Presta Inner Tube |

650x18 to 650x25 inner tube for 650 wheels and tires.


650x18 to 650x25 tires. ETRTO 18/25 - 571


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

Questions & Answers

Product Customer Reviews

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107 Reviews
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Btwin 650c, x 18/25
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good price

does the job easily, time will tell on durability but every confidence so bought 2 more

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Cheap and reliable

A great product that's cheap and reliable. Had no problems fitting it and getting it to inflate. Just need to show my daughter how to change a inner tube now so she can do it next time.

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Good price and easily accessed

I can easily accessed the product in urban store, and the staff is willing to check stock on phone calling. Thanks.

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Hello Man Chun


Thank you for supporting our products. We are happy to hear that you have a pleasant product experience.


We look forward to seeing you again soon and hope you can continue to have fun with our products.


Thank you again for your support. 


Stay healthy. 




Wan Li

Decathlon Hong Kong Cycling Team

Good Service

Exchange service

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Dear Chin, thank you for your time in leaving us with a 5-Star rating on our product and service. We are glad that we managed to delight you with the standards of our product and service. We really appreciate your loyalty with Decathlon. Please let us know if there is anything else we can improve on in the future. Thank you once again for your time and we hope to serve you again soon!


Good fit

Meet expectation

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Gute Schläuche

Alles super. Verwende die Schläuche an meinem Vintage Randonneur und sie halten die Luft sehr gut bisher.

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Miserable Qualität

Ich bin normalerweise von der Qualität von Decathlon Produkten sehr überzeugt. Habe drei dieser Schläuche gekauft und alle drei sind bereits beim Einbau in das Rad kaputt gegangen. Das ist mir vorher beim Fahrradreifen wechseln noch nie passiert. Werde daher in Zukunft wieder auf die etwas teureren aber qualitativ deutlich hochwertigeren Markenprodukte zurückgreifen müssen.

Hallo Sebastian,

vielen Dank, dass du dir Zeit genommen hast, um deine Erfahrungen mit uns zum Fahrradschlauch Presta von BTWIN zu teilen. 
Es ist natürlich sehr ärgerlich, dass du nicht zufrieden bist mit der Qualität, dies werden wir selbstverständlich weitergeben.

Du kannst unsere Produkte 30 Tage gegen Vorlage deines Kassenzettels oder deiner Kundenkarte kostenlos umtauschen oder retournieren. Die Kollegen können dir mit Sicherheit weiterhelfen.

Solltest du hierbei Fragen haben, steht dir unser Serviceteam (service[at] jederzeit zur Verfügung.

mit sportlichen Grüßen
Cumple con su función

Cumple con su función

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Muy mala

Al inflar ya la 2 cámara reventó con solo 5 kilos de presión

Hola Victoriano,

En primer lugar, agradecerte el tiempo que te has tomado en exponer tu valoración sobre nuestro producto.

Lamento que el inconveniente que haya podido generar la cámara de aire. Por lo que te aconsejo aproximarte a tu tienda Decathlon más cercana para que el equipo de ciclismo pueda cambiarte el modelo sin problemas, debido a que seguramente se pueda tratar de un defecto del mismo.

Espero que todo se pueda solucionar y puedas disponer de tu cámara sin problemas.

Gracias por la confianza depositada.

Un cordial saludo, que tengas un buen día.


Javier - Experto producto ciclismo Decathlon

Pésimas con 5 kilos de presión revienta

Muy mala experiencia calidad pésima del producto Eñ

Hola Victoriano,

En primer lugar, agradecerte de nuevo el tiempo que has dedicado para poder hacernos llegar tu valoración sobre el producto. Este tipo de comentarios son los que necesitamos para poder seguir mejorando y conocer las necesidades de nuestros usuarios.

En segundo lugar, pedirte disculpas por las molestias que haya podido generar la cámara de aire. Seguramente se trate de un defecto en la producción de la cámara.

Te aconsejo acercarte a tu tienda Decathlon de confianza para que el equipo de ciclismo pueda darte una solución y cambiar el modelo si lo deseas.

Espero que se pueda solucionar cuanto antes y podamos devolverte la confianza que has depositado en Decathlon a la hora de realizar las compras de material deportivo para el ciclista.

Un cordial saludo, que tengas un buen día.


Javier - Experto producto ciclismo Decathlon

Buen producto

Buen producto calidad precio

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Chambre air 650x25

Parfait fait son travail

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trop lourdes et épaisses

trop lourdes et épaisses

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C'est le modèle que…

C'est le modèle que je cherchai , facile à monter et par expérience je sais qu'elle est solide.

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Additional Product Information



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

How to choose your inner tube

Check the information indicated on the sidewall of the tire (diameter and width). For example, 27.5 x 1.90 means a tire with a 27.5-inch diameter that is 1.90 inches wide. On the tire sidewall, you will also find the dimensions in mm in ETRTO international units. For example, 50-584 means your tire is 50 mm wide with an inner diameter of 584 mm (approx. 27.5 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.


3.8 oz



Warning - california prop 65

Learn more

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.

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  1. product-research

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  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


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