It is because These are equipped with further actions for protection since the heavier the scooter, the higher the pace, and therefore, the increased the need for more State-of-the-art protection features like dual stem locking mechanisms. Oh and that is a list for Grownup folding electric scooters by the way. https://medium.com/@abiron5776786gg/where-to-buy-scorpius-a-electric-scooter-5b624b2e789a