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Btwin 27.5 "x 1.9/2.5" Presta Inner Tube 48 mm

Regular price: $5.99 Regular price:

27.5 x 1.90 to 27.5 x 2.50 Presta valve inner tube for 27.5" tires.

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Size: Select a size
Sale price: $5.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8320817

Product Features

A photo of the Btwin 27.5 "x 1.9/2.5" Presta Inner Tube 48 mm in use

Btwin 27.5 "x 1.9/2.5" Presta Inner Tube 48 mm | 27.5" wheels and tires with a 48 mm Schrader valve.

27.5 x 1.90 to 27.5 x 2.50 Presta valve inner tube for 27.5" tires.


27.5" tires, with a cross-section from 1.90 to 2.50. ETRTO 47/64 - 584


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

Product Customer Reviews

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1261 Reviews
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Btwin 27.5
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Not flat anymore.

Great product. Comparable price and quality to most popular brands.

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Bike tube

Tube punctured within7 days

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It does the job

It was ok

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27.5 inner tube

Perfect and at a great price !

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Decent spare tubes

Good value tube for MTB

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27.5x1.9-2.5 Bike Inner Tube

These are a touch thinner than my usual inner tubes, but for the price, you can't complain. They do the job and you can't quibble with the price.

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Got a flat and needed a new inner tube. Such a great price I bought a couple just to be on the safe side.!

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Cheap but very much not cheerful. Replacing a punctured tube with this, only to find out it's already leaking air. Found the hole and repaired it with a patch and still leaks. In the end I patched up the original tube and gave up on this one. Usually like decathlon stuff but will not buy inner tubes from there again.

I'm sorry to read that the innertube was punctured straight out of the box. This is highly unusual and I am unable to explain why it's the case in this instance.
Peter Lazarus, National Cycling Manager, DECATHLON
Good budget tube

Good budget tube but my local store only has 48 mm valve stems, do they have anything shorter?

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Good Price

Always carried, seldom used but worth having with you. Can't go wrong at the price

Tube - Presta

What can I say about this. Got them on my backpack. Still there, so they don't run away by them self! Not to heavy to carry around. Hope I wont need to use them at all. Not too expensive, so it's fine if I don't use them.

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good quality at affordable price

good quality at affordable price

Hi There,

We're really grateful and appreciate you taking the time to share your rating with us.



Tube Blasted

Tube blasted as soon as I started pumping air

Hello Vivek,

We regret the inconvenience caused due to this. Kindly reach out to the nearest decathlon store workshop, the technicians would diagnose the problem and replace the tube and help you know the right PSI for your tire tube.

Thanks & Regards,



Good quality

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Very bad experience with presta tube

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Additional Product Information



  • 100% Rubber - Synthetic

How to choose your inner tube

Check the information indicated on the sidewall of the tire (diameter and width). For example, 27.5 x 2.10 means that the tire is 27.5 inches in diameter and 2.10 inches wide. On the tire sidewall, you will also find the dimensions in mm in ETRTO international units. For example, 50-584 means a tire that is 50 mm wide and has 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.


8.5 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 (tool drum, original packaging…).

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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Size Guide Visual