Comment on E-bike rules in Australia will soon change with possible ban on sale of bikes faster than 25km/h
ada@piefed.blahaj.zone 3 weeks agoI’m old enough to be past my physical prime, and I don’t own a car. I use my ebike for everything. 250W is fine when your goal is exercise, or commuting, or the odd load here and there, but it just doesn’t cut it for every day use.
Before I owned my ebike, I had a regular road bike that I did 15,000km on. But the only time it got used is when I was commuting or “going for a ride”. It was completely useless as a tool in my daily life. My ebike though sees regular use for things that most people would use a car for, and things that a road bike just couldn’t do.
but it doesn’t cut it for every day use
Can you explain why? Sure, it’s less than 500 W and there will necessarily be situations where it’s not enough. But how would you know it’s insufficient for every day use without trying? If it were, say, 99% as effective it would (probably) be fine, no?
Unless of course you have experience with a 250 W ebike but (from your comments) it looks like you only ever had a single 500 W ebike. Is it possible to limit it to 250 W and seeing how much it changes?
Can you explain why?
Look at the comparison I did elsewhere in the thread. One hill I know of and have climbed many times, going up at just 12 km/h, I’m putting out over 500 W at some points. And that’s on a carbon analogue bike, as a lighter-than-average dude, carrying nothing more than a bottle of water. I’m out of the saddle, working my arse off to get up that hill.
As a cycling advocate, that’s unacceptably difficult. Great for when cycling for fun or fitness, but as an advocate, I do not want people to have to exert themselves that much just to get around. I try to set a baseline effort of 100 W, but up to 200 W for brief periods is not unreasonable. 250 W (plus a 250 W motor) when climbing up a hill even with the lightest possible load, which would easily become 500+ W (plus the 250 W motor) on the way home from shopping or transporting kids to their cricket training, is not reasonable. I want cycling to be accessible to as many people as possible. It has the potential to be a far more accessible form of transport than driving is, if our network design and laws allow it to be. A Dutch-style network is by far the most important thing and would work for 80%+ of potential cyclists, 60%ish of the time.
But to get that last 20% of cyclists 100% of the time, laws designed for the famously flat Netherlands are not necessarily appropriate. And that could include allowing up to 500 W motors. Especially with the NSW law, which states the power must be
progressively reduced as the bicycle’s speed increases beyond 6km/h.
So (assuming it’s linear), at 16 km/h you’d be getting about 250 W of assistance, maximum. At 20 km/h you’re down to 132 W, and at 23 km/h it’s just 52 W. To do that 12 km/h up the hill I was talking about, you’d get about 340 W of assistance, or go down to 10 km/h and get 390 W, plus 1–200 W from your legs, which should be enough to get an older or less physically capable cyclist up the hill with their shopping or (grand)kids.
@Zagorath
If the bike is speed limited and the power tapers off with speed, why have a power cap at all? More power just means that they get up to speed quicker, which is a good thing in traffic, particularly when loaded up.
I go quite a bit faster (on the flat) on my acoustic bike, are they proposing a ban on me pedaling too hard?
@yetAnotherUser
Power cap is still useful to limit acceleration to safe levels and to minimise the level of danger if the motor gets de-regulated.
Yeah, my current bike has a power scale setting. Adjusting the pedal assist directly adjusts the max power output. And at the 250W level, I work up a sweat whenever I push it.
Which, again, is fine, if the bike is just for exercise or commuting. But it stops it from being a viable car replacement.
Taleya@aussie.zone 3 weeks ago
I used mine in part to move house, as well as regularly dragging reno supplies, groceries and my own fat arse. I am regularly using it to haul. Extremely regularly. And in no way a fit person or spring chicken myself
ada@piefed.blahaj.zone 3 weeks ago
I run. I cycle. My road bike has 15,000km on it. But I can’t do the things I need to do on a 250W ebike easily enough for it to replace a car in my daily life.
I could do all of the things you’re talking about if my goal was to give myself a workout, but when the goal is to use it instead of a car, 250W doesn’t cut it, because I’d be dripping in sweat and worn out half the time.
Taleya@aussie.zone 3 weeks ago
it’s not supposed to be a car. I don’t know why you think it is.
ada@piefed.blahaj.zone 3 weeks ago
you don’t need to be condescending to get your point across. We’re having a discussion and disagreeing, . The first sentence would have got your point across just fine.
In any case, I know it’s not a car. But at the moment, my ebike means I don’t need a car. I want a bike that lets me get through life without having to own a car. A 250W would mean that I’d have to call taxis and ubers more often to carry shopping, it would mean that I couldn’t just carry the mulch home on my bike.
I mean, I could do those things, but at 250W, I’m putting in a lot of the power myself. And I’ve already got my exercise covered. I don’t need to be changing clothes and taking a shower every time I ride up a hill on my bike.