Comment by antisthenes
4 years ago
> I'm curious - what ebike do you have that can easily cruise at 48-53 kph for extended periods?
Those speeds sound like bogus. I can maintain about 40kph on my ebike on a flat surface, but that requires pedaling in addition to the motor and is a fairly energetic exercise.
Also, pushing beyond 45kph, you really start to feel the air resistance and it becomes exponentially harder to go beyond 45kph for any long period of time, unless going downhill.
Most ebikes don't really come with the chainring size to go up to high speeds, unless modified with a giant 50+ size, which is more apt for racing road bikes (non-electric)
> you really start to feel the air resistance and it becomes exponentially harder to go beyond 45kph
Nitpick: it becomes cubically harder. ;)
Nitpick to nitpick: cubically is a subset of exponentially.
You are both wrong. Air resistance increases quadratically with speed, not cubically. And you mixed up polynomial with exponential.
Quadratic: x^2
Cubic: x^3
Polynomial (eg. 3rd degree): a + b x + c x^2 + d x^3
Exponential: e^x
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