How to choose an inner tube
Note all the information visible on the tire's sidewall (diameter and cross-section). For example, 27.5x2.50 means that the tire is 27.5 inches in diameter and 2.50 inches wide.
On the tire's sidewall, you'll also find the dimensions in mm in the international ETRTO unit.
For example, 50-584 means that the tire is 50 mm wide and has an inside diameter of 584 mm (i.e. 27.5x2.00).
Removing the inner tube
Dismantle the used inner tube using B'TWIN tire changers
Checks before fitting an inner tube
Check the condition of your tire, and replace it if necessary.
Make sure there are no foreign objects in the tire.
Check the condition of your rim tape.
Even a slightly cracked rim tape can cause punctures.
Check your rim for any damage that could harm 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 into the valve hole, making sure you use the correct type of valve for your rim.
Place your tube in the entire tire, pushing the tube so that it is positioned 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.
