20" 1.7 To 2.2 Schrader Valve Inner Tube

8311089

B'TWIN

Made for 20" wheels for children's or folding bikes with 1.70 to 2.20 cross-section tyres.
20" Schrader inner tube (large valve) for 20-inch tyres and wheels.
Sizes guide

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Advantage
Compatibility20" tyres and wheels with a cross-section ranging from 1.7 to 2.2.
WaterproofHigh-quality valve that retains air pressure well.
Waranty2 Years
Technical Information

1
How to choose an inner tube
Check the information indicated on the sidewall of the tyre (diameter and width). For example, 26 x 2.20 means your tyre is 26 inches in diameter and 2.20 inches wide. On the tyre sidewall you will also find the dimensions in mm in ETRTO international units. For example, 50-559 means a tyre that is 50mm wide and has an inner diameter of 559mm (approx. 26 x 2.00).
2
Removing an inner tube
Remove the used inner tube using B'Twin tyre levers (item code 8047839).
3
Checks to carry out before installing an inner tube
Check the condition of your tyre and replace it if necessary. Make sure no objects are lodged in the tyre. Check the condition of your tyre 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.
4
Mounting the inner tube
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 tyre so that it fits inside the rim. Take care not to pinch the inner tube when fitting.
5
Mounting the tyre
Start by mounting the tyre onto the wheel on the opposite side to the valve. Finish mounting the tyre at the valve to avoid pinching the inner tube. Never mount your tyre with a screwdriver or a tyre lever, as you risk pinching and puncturing the inner tube.
6
Inflating the tyre
Inflate your tyre carefully, to the pressure recommended by the manufacturer (visible on the tyre sidewall in PSI or bars, 1 bar = 14.51 PSI). Regularly check that your tyre is in the correct position as you inflate it.
7
Tip from the pros
To avoid punctures from pinching and for best tyre performance, we recommend that you check your tyres and inflate them to the suggested pressure before every ride.
8
Weight:
148g
9
Complementary products
You'll need a tyre lever (reference 8047839) to change your inner tube. If you want to repair a punctured inner tube, you can use repair patches (reference 1779640) or self-adhesive patches (reference 8380935)
Information / Concept / Technologie
Composition
Main fabric : 90.0% Rubber - Isobutylene Isoprene Rubber (IIR) - Butyl, Main fabric : 10.0% Brass

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

Stockage tips
Carry your inner tubes in a container that protects them from perforations (B'Twin carry case, original packaging, etc.).

Reviews

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Tyre
Used for 2 to 8 weeks
Good product with a video with clear instruction to change the tyre.
So far so good
Used for 2 to 8 weeks
Upon fitting the inner tube to the tyre with some air in it, it seems the tube is longer than the tyre. It kind of folds a bit (BTWIN Foldable bike) after fitting.Who knows if it's still folder once fully inflated.

So far it still holds the tyre and works....
Good quality at low cost
Used for 2 to 8 weeks
Bought a pair for my fold up bike and sons BOX. These are superior to the cheap innertubes sold by other shops.
Low cost. Holds air well.
Heavy.
Poor quality
Used for 2 to 8 weeks
I think maybe on this occasion it would have been better to have paid for a better quality tube
Cheap
Very poor quality meaning prone to punctured
Response of the brand
Dear Sir,
I'm sorry to read that you have had a puncture.
Regards,
Peter Lazarus UK Market Manager DECATHLON
Andre not found this answer helpful
Quality Product
Used for 2 to 8 weeks
Quality product fits perfectly for Btwin bike
Quality or installation seems to be the problem.
Used for 1 week or less
After getting the tube replaced, we found out a puncture again the next morning.
Response of the brand
Hello,
Thank you for taking the time to give us your feedback. Inner tubes and tires are wearable components and it is possible for punctures to happen due to external factors and internal problems like pinching and spoke piercing. Please get the wheel diagnosed again for any such signs. Feel free to write back if you have any questions. 

Deepak Babu E-sport manager DECATHLON
20" tube puncture after 3 days use
Used for 1 week or less
Very bad quality. air leak after 3 days of use. Travel from home to MRT station and back about 600meters
ВЪТРЕШНА ГУМА 20"
Used for 2 to 8 weeks
Гумите са качествени, с добра плътност на материала.
Смяната извършиха в магазина и също съм доволна от обслужването!
Дебелина на материала
Няма
Vynikající
Used for More than 1 year
Bezva produkt, velmi dobře dostupný.
Gut
Used for 1 week or less
Gut
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