donn wrote: ↑
Apr 30 2019 4:45pm
The legal classification of electric bicycles is thoroughly irrelevant. Luckily, because it's utter BS. Bicycles don't operate at some narrow characteristic speed range, they go real fast down hill and real slow up hill. We're not going to arrive at useful and enjoyable electric bicycle design by consulting the legal classifications.
The speed limits imposed on "low speed vehicles" aren't arbitrary, which is the point I'm making. Just about every country has similar restrictions and what they consider a "safe operating speed". Take a look at a moped, they're basically designed to go 30mph. Just about everything on a moped is slightly beefed up compared to a bicycle. It's not because companies like to use heavier frames, thicker spokes and bigger bearings, it's because it's needed to withstand the forces at the designed speed.
Sure you can do 100mph on a bicycle but that doesn't mean it was designed to go 100mph.
I don't know what the actual speed bicycles are designed for. My rough guess is about 10-15mph. I've seen kids wreck box store bikes in a couple weeks riding much less than 25mph. Cheap Chinese components can't hold up to 100lb rider, putting out 200W, at about 15mph.
I'm trying to put numbers to this so you can see what I mean. I'm not sure if this helps you or not?
Do you guys own a BBSHD? I've ridden one for 5 months now. It's on a bike that would have been about $2000 when it was new (paid $300). It's not full suspension and the BBSHD is kicking the crap out of it. There's absolutely no question in my mind that this bike, as good as it is, is simply not designed to carry my 200lbs and the 40lbs of motor and battery. I'm surprised I haven't snapped an axle yet.