DECATHLON

AIR CHAMBER 650x28/42 PRESTA

4.90
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Ref. : 8549087

This tube will fit your 650 diameter tire, section 28 to 42 with Presta 48 valve mm.

650x28/42 Presta inner tube for tires size 650 and cross-section from 28 to 42 mm.

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PRODUCT BENEFITS

Compatibility

Tires from 650x28 to 650x42 and wheels from 650, section 28 to 42. ETRTO 28/42 - 571

Waterproofing

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

TECHNICAL INFORMATION

How to choose an inner tube

Note all the information visible on the tire's sidewall (diameter and section).
For example, 26 x 2.20 means a tire with a diameter of 26 inches and a width of 2.20 inches.
On the tire's sidewall you'll also find the dimensions in mm in the international unit ETRTO
For example, 50-559 means a tire with a width of 50 mm and an inside diameter of 559 mm (i.e. 26 x 2.00).

Removing an inner tube

Remove the used inner tube using B'TWIN tire levers

Checks before fitting an inner tube

Check the condition of your tire, and replace it if necessary.
Make sure there are no foreign bodies in the tire.
Check the condition of your rim tape. Even a slightly cracked rim base can lead to punctures.
Check your rim for any alterations that could damage your inner tube.

Fitting the inner tube

See our video before you start.
Pre-inflate the tube slightly to avoid any risk of pinching.
Insert the valve in the valve hole, making sure you use the correct type of valve for your rim.
Place your tube in the whole tire, pushing the tube so that it sits in the hollow of the rim.
Make sure you don't pinch the tube when you finally mount the tire.

Tire mounting

Start by mounting the tire on the valve.
Finish the mounting on the opposite side of the valve to avoid pinching.
Never mount your tire with a tool or tire lever, as this can pinch and puncture the inner tube.

Tire inflation

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 the tire is correctly positioned when inflated.

Pro tip

To avoid pinch punctures and get the best performance from your tire, we recommend that you check and, if necessary, re-pressurize your tire before every outing.

Weight

165 grams

Warranty

2 years

COMPOSITIONS / ADVICE

Composition

Main part 90% Isobutylene rubber isoprene butyl, 10% Brass

STOCK TIPS

Transport your inner tubes in a container that protects them from punctures (B'TWIN transport canister, original packaging, etc.).

Restrictions

Take care not to pinch the inner tube during assembly.

TESTS

To guarantee optimum quality, we check 100% of our inner tubes by pressurizing them for 8 hours.

USER REVIEWS

Questions & answers