Australian Cycling Forums - Bicycles Network Australia

Yes the figures are BS

250w is enough to get you to 74km/h, but only in a recumbent with full fairing with class leading aero.

Maybe they measured the speed the same way they used to for a datsun 120y - downhill with a stiff tailwind

RonK wrote: ↑

Sun Jul 25, 2021 6:57 pm

skyblot wrote: ↑

Sun Jul 25, 2021 3:03 pm

RonK wrote: ↑

Sun Jul 25, 2021 2:10 pm

100kph e-bikes? Gotta be the beatup if the year.

There is no modification that will make a 250w pedelec go 100kph.

You could probably modify a Stealth bike up to that speed, but they were never legal to start with.

From the article:
"While there is a huge range of quality, purpose-built e-bikes on the market, many people were buying e-bike kits online, removing the speed limiter chips and retro-fitting them to their existing bike, Mr Cowper said."

So not modifying pedalecs, but I guess slipping in a high powered hub motor. But even so, 100kmh plus would take some serious power.

A bolt on motor and battery pack that will convert a standard pedalec to a 100+ kph motorcycle? If you believe that you probably believe there are fairies at the bottom of the garden to.

No, I didn't say about converting pedalec's to high powered e-motor bikes. I quoted the article where it indicates people are putting after market kits on the pre-existing bikes, presumably not factory e-bikes.

3Kw would see my recumbent (with a CdA or 0.182) achieve 100kmh, an upright bike more like 6kw. Maybe. Finding a motor with the power and RPM to do it I don't know. I have no interest in looking, but I daresay they are out there.

OK, so I looked... A brief search shows high power e-bikes in the USA with 8Kw hub and mid drive options.
https://hpcbikes.com/pages/electricbikes
The same company has 2500w mid drive kits, and 6kw hub drive kits.

Does the 35kg limit apply to only 200w bikes, or 250w too?

I am looking to purchase a cargo bike, but both the models I am looking at weigh just over 35kg.

Also, to be pedantic, with the power being mandated to gradually be reduced once reaching 25kmph, what's stopping you from reducing the 250w assistance very slowly? Like, reducing assistance by 1 watt per minute.

Haydeeny wrote: ↑

Thu Aug 19, 2021 7:30 pm

Does the 35kg limit apply to only 200w bikes, or 250w too?

I am looking to purchase a cargo bike, but both the models I am looking at weigh just over 35kg.

Also, to be pedantic, with the power being mandated to gradually be reduced once reaching 25kmph, what's stopping you from reducing the 250w assistance very slowly? Like, reducing assistance by 1 watt per minute.

35kg limit applies only to the new definition for 200w.

Also you are misreading the definitions - power for 250w must be cut off by 25km/h

Ah, yes, I get confuddled when on the phone and I am unable to read what I am replying to.

It was the OR that confused me. Maybe the way it is written is not what I am used to?

1- Power must be cut off once you reach 25 kmph, or stop pedalling.

It feels like you are being given a choice.

2- If you reach 25 kmph or stop pedalling, power must be cut off.

Some how to my mind they mean different things, and I am struggling to reconcile why that is. Like, power must be cut off, but you can choose between the two stated conditions in sentence 1.

Sentence 2 makes more sense to me.