Wow, that is really fast for a bike. Are you allowed to drive these bikes on all bike paths and such? Where I live (Sweden) they are limited to 25 km/h (~16 mph).
California is the farthest ahead in regulating them in the US. 28 MPH is the top speed for a "Class 3" bike, and is barred from some bike paths in California:
In practice I ride it like a car when I'm going car speed, and like a bike when I'm going bike speed -- my goal is for it to always feel safe to people around me given where it is.
https://currentebikes.com/ebike-classes-california/
In practice I ride it like a car when I'm going car speed, and like a bike when I'm going bike speed -- my goal is for it to always feel safe to people around me given where it is.