I am new to this forum and joined because I am having trouble with an electric scooter purchased for my brother a few months ago. It was a birthday gift and he drives it around a lot. Lately, the tire pressure has gotten low, so I decided to address it. The scooter came with these long tube adapters to fill the valve stems of the tires. Had to pry them to get the adapters attached which I had no problem doing. The issue that I am having is that whenever I try to pump into the tires, they do not accept it. When I try to pump the front tire, air comes out of the wheel bearing for some reason. When I try to pump the rear, air comes out of the rear screw holding the axle in. I was wondering if anyone here has a solution to this or has dabbled in a similar dilemma. Any help would be much appreciated in this matter!