When installing the 8.5x3-5.5 inner tube with 90° valve (air chamber) for an electric scooter, it is recommended to sprinkle a little talc inside the tire to prevent friction between the rim and the tire. Be careful when using tire levers so as not to cause punctures in the inner tube or scratches on the rim. It is compatible with Zero 8, Zero 9, Kukirin G2 (2024 1st Gen) electric scooters.