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Simple e-bike

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88V8
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Simple e-bike

#439529

Postby 88V8 » September 3rd, 2021, 7:11 pm

OH's bike use has decreased markedly. Well she is 70 and a little arfrisits creeping in, and it's hilly round here.

This e-bike looks interesting.
Nice and simple.
No gadgets.
Comes with mudguards and lights and a stand, needs only a bell.
Driven by a fan belt.

What happens when the battery dies, can one get a new one, will the maker still exist.... e-bikes do seem to be a bit of a garden shed niche business.
Anyway, inclined to give it a go.

It's crowd-funded, well over its target.
https://www.indiegogo.com/projects/noth ... ric-bike#/

Any thoughts?

V8

redsturgeon
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Re: Simple e-bike

#439606

Postby redsturgeon » September 4th, 2021, 9:13 am

88V8 wrote:OH's bike use has decreased markedly. Well she is 70 and a little arfrisits creeping in, and it's hilly round here.

This e-bike looks interesting.
Nice and simple.
No gadgets.
Comes with mudguards and lights and a stand, needs only a bell.
Driven by a fan belt.

What happens when the battery dies, can one get a new one, will the maker still exist.... e-bikes do seem to be a bit of a garden shed niche business.
Anyway, inclined to give it a go.

It's crowd-funded, well over its target.
https://www.indiegogo.com/projects/noth ... ric-bike#/

Any thoughts?

V8


A few thoughts.

Crowd funding is not risk free, although these guys seem to have a decent track record.

That said, this bike looks well made and thought out and it has the Gates drive carbon belt

One big negative though is the hub electric drive not as good as crank driven.

Another big issue is they aren't planning to ship before March 2022...so add a few months to that.

If I was looking for a no nonsense e-bike from a well respect source I'd buy one of these.

https://www.vanmoof.com/en-GB/s3?color=dark

They even track it down and retrieve it if it is stolen.

John

88V8
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Re: Simple e-bike

#439620

Postby 88V8 » September 4th, 2021, 10:59 am

redsturgeon wrote:A few thoughts.
Crowd funding is not risk free, although these guys seem to have a decent track record.

If I was looking for a no nonsense e-bike from a well respect source I'd buy one of these.
https://www.vanmoof.com/en-GB/s3?color=dark

Thankyou.
Unfortunately that bike is too 'tall' for OH.
Plus it has next-gen innovation which is the sort of thing I run away from.
And my inner meanie sees that it's twice the price of the bike I might with luck have 'bought'.

It's a long time since I put anything into crowdfunding, and that was a few quid, not the £900 that I lobbed in last night... yes, I did, because they only had one of the stepover bikes left.
Stepover... can't call them 'ladies' bikes any more I suppose, harrumph.

Will it appear, will it be any good... I'll let you know.

Meanwhile I started a thread about the Whys of crowdfunding.... posting.php?mode=post&f=29

V8

todthedog
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Re: Simple e-bike

#439693

Postby todthedog » September 4th, 2021, 4:18 pm

We live in West Wales which is a bit lumpy. Transformed our bikes with electric front wheel hub kit with the biggest battery that I could integrated into a rack over the real wheel. I own some dodgy leg joints and my conversion was an old mountain bike step through, I find it hard getting my leg over these days :D We now use the bikes regularly. Highly recommend. The kit seller we used has now gone but the bikes work just fine.

servodude
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Re: Simple e-bike

#439754

Postby servodude » September 5th, 2021, 2:07 am

88V8 wrote:Stepover... can't call them 'ladies' bikes any more I suppose, harrumph.


Must admit I had to borrow one to get to a party once as I couldn't use my bike easily in my kilt

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Re: Simple e-bike

#439755

Postby servodude » September 5th, 2021, 2:25 am

redsturgeon wrote:If I was looking for a no nonsense e-bike from a well respect source I'd buy one of these.

https://www.vanmoof.com/en-GB/s3?color=dark

They even track it down and retrieve it if it is stolen.

John


I immediately thought of that Vanmoof when I saw the bike in the link - I've not seen one in real life yet but it ticks a lot of boxes

What I would be really interested in is a conversion kit similar to the way things are done in the nothng; it looks like it could be a very minimal and elegant solution

-sd

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Re: Simple e-bike

#439977

Postby 88V8 » September 6th, 2021, 10:18 am

todthedog wrote:The kit seller we used has now gone but the bikes work just fine.

This is one thing that bothers me about e-bikes. It seems to be a cottage industry, and with many of the offerings I envisage finding in short order that the makers have vanished and there are no spares.
That should have led me to buy from an established maker, such as Specialised. Alas, my inner meanie....

Also, I am not an 'early adopter'. For instance I have yet to buy a DVD player.
But here I am 'buying' a bike that is not even in production.
The strange things we do.

V8

todthedog
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Re: Simple e-bike

#440138

Postby todthedog » September 6th, 2021, 6:23 pm

The pricy bit is the battery.
Not a lot to go wrong there.
Put it into perspective what are you prepared to pay for a holiday or a night out things you will never get bach :D

9873210
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Re: Simple e-bike

#440185

Postby 9873210 » September 6th, 2021, 11:28 pm

todthedog wrote:The pricy bit is the battery.
Not a lot to go wrong there.

Au contraire. It is possible, even easy, to "brick" most modern cells in a single charge cycle. A few of the failure modes are spectacular.

A battery will contain electronics (and almost always software) to prevent spectacular, and in some cases, non-spectacular battery damage. It works better if the motor controller and charger know about the batteries limitations and work with them. Using third party spares requires taking care that everything is compatible.

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Re: Simple e-bike

#440189

Postby servodude » September 7th, 2021, 12:19 am

9873210 wrote:
todthedog wrote:The pricy bit is the battery.
Not a lot to go wrong there.

Au contraire. It is possible, even easy, to "brick" most modern cells in a single charge cycle. A few of the failure modes are spectacular.

A battery will contain electronics (and almost always software) to prevent spectacular, and in some cases, non-spectacular battery damage. It works better if the motor controller and charger know about the batteries limitations and work with them. Using third party spares requires taking care that everything is compatible.


This is true - quite an impressive energy density in a cell

But we're almost at the stage where a charger just needs to provide the correct DC voltage (and enough current)
- all the gauging, charge termination, balancing, conditioning and fault handling can be done in the battery pack

Probably too much to hope for generic swappable smart packs at the moment
- but if there's enough interest I expect that a standard might arise (an expected SMBus command subset or similar)

- sd

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Re: Simple e-bike

#440196

Postby 9873210 » September 7th, 2021, 6:56 am

servodude wrote:
But we're almost at the stage where a charger just needs to provide the correct DC voltage (and enough current)
- all the gauging, charge termination, balancing, conditioning and fault handling can be done in the battery pack

Probably too much to hope for generic swappable smart packs at the moment
- but if there's enough interest I expect that a standard might arise (an expected SMBus command subset or similar)

- sd


Proper care of the battery affects discharging as well as charging. Limits during discharge may affect the user directly and can be safety issues. An e-assist going into a hard thermal shutdown in a peloton climbing Box Hill will be noticed.

Degrading performance gracefully takes significant engineering effort, based on how the battery acts as it approaches its limits. It often ends up affecting many aspects of the control algorithms. I find it hard to imagine the motor controller negotiating this with an unknown battery on the fly.


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