We bought Hover 1 scooters last year and it never occurred to me that inflating the rear tire (with an internal motor) would be so painful . None of my adapters fit the stem, which is completely embedded in the body. Hover-1 support response? Take it to your local bike shop and see if they can help. It's at least an hour away. I don't do this every time I need air in a tire. Did some research and read about these extensions which I believe are for specific RV tires. Either way they will fit as these tires have standard valve stems. It took a few seconds to unscrew it by hand, add air, take it off again - all in under a minute. So easy.
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