Electric scooter components
Suspension, wheels and IP protection on electric scooters
How electric scooter chassis work: suspension types (coil spring, hydraulic/oil-spring, rubber cartridge/OSAP, none — Apollo, NAMI, Kaabo, Dualtron, Inokim, Xiaomi, Segway), pneumatic vs solid tyres (tubeless self-sealing on Xiaomi 4 Pro, Apollo City Pro, MAX G30; honeycomb on sharing and aftermarket), the IP standard under IEC 60529 / EN 60529 — IPX4 / IPX5 / IPX7 / IP54 / IP67 / IP68 (Xiaomi M365, Ninebot F40, Lime Gen4, Bird Three), what an IP rating does not mean, and why neither EN 17128:2020 nor eKFV sets a minimum IP.