E-bikes could get faster, more powerful and not require pedaling, in a move announced today by UKGOV. Cycling organizations are opposed to the plans.
At that speed, you want something beefier than a bike frame and parts. A US class 3 ebike is limited to 27mph on a 750W motor. That’s stressing the limit of bike parts, even with ebike tires and chains.
A typical human can put down around 250W into a bike, and the best athletes around 400W. 750W plus what you put into it is outside the original intent of bike parts.
If you want to go 45mph, everything needs to go up a notch in design. That increases both weight and cost. A $1-2k range is only possible with the cheapest crap scooter parts. Get closer to $4k and things look better.
People should have some kind of licensing for this. Always should have for the ICE versions, and probably for class 3 ebikes, too. Maybe just the motorcycle license, maybe something specific, but it shouldn’t be wide open.
I agree with most of what you’ve said.
However, I have a bottom of the barrel, 250w hub motor ebike. With pedal assist, it gets me cruising at 20mph no problem. I got it from Walmart for $400. I am pretty ignorant when it comes to production and manufacturing but it stands to reason that at 5x the price, they could make something that would safely go a little over twice the speed.
The problem with ebikes is that they manufacture all these huge, fat-tire, inefficient pieces of garbage and then price them at $3k like some luxury item.
I’m hoping cheap, fast ebikes are coming soon.
I agree on the licensing part, but you don’t need to get that much beefier for 45mph that you spend USD$4k. $1-2k is good ebike territory, I’d put these are $2-3k for something reasonably priced. This is coming from someone that has a 110cc road-going motorbike. Yes, motorbike, not scooter. The frame is about twice as thick as a mountain bikes. The things that really needs the most beefing up are the fork suspension and headstem.
Honestly the whole bloody problem with electric motorbikes and scooters (of the sitting variety) is that they’re way overpriced for terrible range (<100km). Something in the $2-3k with that sort range that can go ~75kph would be the sweet spot for consumers I think. Especially if you’re paying the costs to get your motorcycle endorsement on top. Which is pretty pricey where I am in Australia.
Bike gears are just not meant for this kind of torque. Cassettes get worn way faster at 750W + rider output. The derailleur transmission is lightweight and cheap, but it has limits and needs to be abandoned if you go much higher.
Who was talking about using bike gears? But also, you should abandon derailleurs at any speed unless you’re racing the tour de france. The only advantage they have over internal hub gears is weight. And hub gears can be easily made strong enough to handle that sort of torque.
But you wouldn’t necessarily need gears At All for something throttle driven. Electric motors have more than enough range of RPM on a single speed gearing system to get to 45mph. E-bikes only have gears for the human component, not the motor.
