If you go faster without the fairing, is it really an aerodynamic improvement? Maybe I'm missing something.
35 on a faired TT bike sounds more accurate. I don't think I'd like doing that kind of speed on a bike on the street anyway, with pinch flats and all. I'd definitely be running tubeless tires 2" wide or more for peace of mind and comfort. I wouldn't trust most recreational/occasional riders to be zipping around over 15 mph anyway, since no one really teaches kids or adults in this country how to ride safely.
You've obviously got quite a bit of experience in the motorized bicycle arena, and I stay out of that. What I can say is that a Michigan officer who shall remain nameless admitted that the likelihood of getting pulled over on a bicycle, even for running a red, is very small due to legal grey area and the difficulty of prosecution. I still try to be respectful to other road users and the law, but sometimes it's safer to bend the rules a bit. I think there is some understanding from law enforcement, but it's not entirely consistent so, of course, bend rules at your own risk
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I imagine that if you are riding an e-bike respectfully there wouldn't be much of a problem. People often ask my friend with the Pugsley and frame bag where the motor is. He points at his legs. I take this to mean that most people have a positive view of e-bikes, or are at least curious.