This will allow you to screw the pump extension supplied with the Xiaomi Mijia M365 electric scooter with ease, keeping more air in the tire.

DESIGNED TO BE PRINTED in TPE/TPU, as the inner diameter of the STL (9mm) is smaller than that of the metal connector (10mm). It is a press fit. Therefore you may try with rigid materials scaled up 110% or more, although I have not tested this.

The technique is to cup your hand beneath like shown in the picture, apply pressure upwards against the adapter and pull your hand away in one fast motion in order to maximize its utility. Best if you start unscrewing from the point just before you hear air escaping. You could probably also use a string or flexible strip of material if it's still too small for your grip, kind of the way you start a lawn mower. If I went with a diameter any bigger I reasoned that it would still take about the same time fussing without the adapter.

For your safety, please also review if your scooter is part of the M365 recall starting June 2019: https://www.mi.com/global/support/mi-electric-scooter-recall-program/

My favorite way to receive your thanks is with photos of your makes here or on Insta @hechoenchillan or FB @chillanmakerspace!

Mi forma favorita de recibir agradecimiento es subiendo tus makes acá o mejor en Insta @hechoenchillan y Face @chillanmakerspace!

https://youtu.be/j6CTLtuodLg