Spoke sensor for bicycle...

[Lasse Langwadt Christensen]

mandag den 11. juli 2022 kl. 16.55.54 UTC+2 skrev rbowman:

On 07/11/2022 02:59 AM, albert wrote:
In article <t8d3mh$hc9$1...@dont-email.me>,
Dimiter_Popoff <d...@tgi-sci.com> wrote:
SNIP

I have seen \"normal\" bicycles with a battery and some electric
motor... I was told the motor just helps you, they are made not
to move on their own, you have to pedal but you get assistance
(making life easier uphill I suppose). Some nonsense that, why
would I bike if I didn\'t want the exercise.

Everybody uses a bike here, including elderly with a heart condition.
In the Netherlands electric bikes are quite popular. They are bought
by people to occasionally take a slope easier, or go slightly faster.
They are eminently practical and handle as normal bikes with benefits.
At least 10 % of new bikes sold are electric (probably more).

Groetjes Albert

Are they as expensive as in the US where they start at 1600 USD and go
to more than twice that? I watched a video by a man in his \'60s that was
very informative. He liked the bike but pointed out some of the
disadvantages. Since they\'re a hot commodity they tend to get stolen.
The best U-lock or chain is no obstacle for someone with a portable
angle grinder. The batteries are also vulnerable, at around $500. They
do have a lock but according to him a couple of sharp blows with spring it.

He\'d had knee problems and hadn\'t ridden a bicycle in 30 years. Between
that and the higher center of gravity he\'d fallen twice. He did a survey
of the ebike forums and found that was common. My thought was they may
attract people who have little experience on two wheels. That\'s
concerning since they seem to fall into two categories, 20 mph motors
with more torque and 27 mph motors wound for a little less torque but
more speed.

in EU regular electric bikes are max 250W and no electric aid above 25km/h (~16mph)
you can get one from ~800€ and up

here there also a trail with the so called \"speed pedelec\", they are more like a moped.
max speed 45km/h it needs to be registered and have insurance and you have to
wear a helmet and have a moped or car license

 

[rbowman]

On 07/11/2022 09:48 AM, Lasse Langwadt Christensen wrote:

in EU regular electric bikes are max 250W and no electric aid above 25km/h (~16mph)
you can get one from ~800€ and up

The specs are all over the place. I even saw one that claimed 500w, 250w
nominal in Europe. Somehow I\'m suspicious of a 750w claim by Bafang.
There was a flood of Chinese scooters for a while, some claiming 150cc\'s
which it turned out was the oil volume. It was actually a 50cc engine.

here there also a trail with the so called \"speed pedelec\", they are more like a moped.
max speed 45km/h it needs to be registered and have insurance and you have to
wear a helmet and have a moped or car license

Some trails here have signs posted banning any ebikes but they are
traditional mountain bike trails, not the paved multiuse trails in town.
I have a couple of pedal powered bicycles, and three motorcycles so I\'m
not anti-bike but I\'m not comfortable sharing a pedal bike / pedestrian
trail with something capable of 45 km/h. They would be better suited
for city streets with bike lanes where they could keep up with traffic
in many cases.

 

[Lasse Langwadt Christensen]

tirsdag den 12. juli 2022 kl. 06.44.05 UTC+2 skrev rbowman:

On 07/11/2022 09:48 AM, Lasse Langwadt Christensen wrote:
in EU regular electric bikes are max 250W and no electric aid above 25km/h (~16mph)
you can get one from ~800€ and up
The specs are all over the place. I even saw one that claimed 500w, 250w
nominal in Europe. Somehow I\'m suspicious of a 750w claim by Bafang.

unless it is type approved, max 250W, no aid above 25km/h it is not legal on public roads
if stopped by police you\'ll get a fine, possibly confiscated the bike and in an accident you\'ll
have problems with insurance

 

[none]

In article <jj2rvjFtmn4U1@mid.individual.net>,
rbowman <bowman@montana.com> wrote:

On 07/11/2022 02:59 AM, albert wrote:
In article <t8d3mh$hc9$1@dont-email.me>,
Dimiter_Popoff <dp@tgi-sci.com> wrote:
SNIP

I have seen \"normal\" bicycles with a battery and some electric
motor... I was told the motor just helps you, they are made not
to move on their own, you have to pedal but you get assistance
(making life easier uphill I suppose). Some nonsense that, why
would I bike if I didn\'t want the exercise.

Everybody uses a bike here, including elderly with a heart condition.
In the Netherlands electric bikes are quite popular. They are bought
by people to occasionally take a slope easier, or go slightly faster.
They are eminently practical and handle as normal bikes with benefits.
At least 10 % of new bikes sold are electric (probably more).

Groetjes Albert


Are they as expensive as in the US where they start at 1600 USD and go
to more than twice that? I watched a video by a man in his \'60s that was
very informative. He liked the bike but pointed out some of the
disadvantages. Since they\'re a hot commodity they tend to get stolen.
The best U-lock or chain is no obstacle for someone with a portable
angle grinder. The batteries are also vulnerable, at around $500. They
do have a lock but according to him a couple of sharp blows with spring it.

New electric bikes start well under 1000 euro\'s, second hand still less.
The batteries are a concern, but one will live with that.
Stolen bicycles is a concern, but there are electronic ways to counter
that.

Concerning spoke detectors.

If the material is stainless, the conclusion that it has no
magnetic properties is not warranted. Check with a magnet.
My 30 year old race bike has stainless spokes, but they are magnetic.

Yesterday I walked home from my restaurant,
inspecting 200 bicycles. From those approximately half
have galvanised spokes. No need to inspect those, they are magnetic.
From the other bikes there were few we expected to have non magnetic
spokes.
I suspected especially those that are black and thin.
These are not carbon fiber,
but they are slightly magnetic, sufficiently to detect I guess.

The bottom line suggests that the news is good if you want to market a
device that works on spokes. However I found something strange.
My friend has magnetic spokes front, non-magnetic at the rear.
Another friend has slightly magnetic spokes... in the even positions
right and non-magnetics spokes in the odd positions.
Apparently there are batches of spokes and they switch in the middle
of spoking a wheel, and the magnetic properties are apparently of
no concern.

Groetjes Albert
--
\"in our communism country Viet Nam, people are forced to be
alive and in the western country like US, people are free to
die from Covid 19 lol\" duc ha
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst

 

[Clifford Heath]

On 12/7/22 14:43, rbowman wrote:

On 07/11/2022 09:48 AM, Lasse Langwadt Christensen wrote:
in EU regular electric bikes are max 250W and no electric aid above
25km/h (~16mph)
you can get one from ~800€ and up
The specs are all over the place. I even saw one that claimed 500w, 250w
nominal in Europe. Somehow I\'m suspicious of a 750w claim by Bafang.

Bafang have a 750W crank-mount motor, and a 1000W one. If they\'re
efficient enough they don\'t have to dissipate much of that, of course.

They can be road-legal if the controller limits the output to 250W.
You might need to prove that however, especially if the bike can unlock
full power for off-road use.

 

[none]

In article <17028e82e5d5a448$1$1440173$68dd626a@news.thecubenet.com>,
Clifford Heath <no_spam@please.net> wrote:

On 12/7/22 14:43, rbowman wrote:
On 07/11/2022 09:48 AM, Lasse Langwadt Christensen wrote:
in EU regular electric bikes are max 250W and no electric aid above
25km/h (~16mph)
you can get one from ~800€ and up
The specs are all over the place. I even saw one that claimed 500w, 250w
nominal in Europe. Somehow I\'m suspicious of a 750w claim by Bafang.

Bafang have a 750W crank-mount motor, and a 1000W one. If they\'re
efficient enough they don\'t have to dissipate much of that, of course.

They can be road-legal if the controller limits the output to 250W.
You might need to prove that however, especially if the bike can unlock
full power for off-road use.

Remember there are also electric powered scooter and bikes, that
are considered motor vehicles, and fall under the same regulations
as gas powered, e.g. registration and insurance.

Groetjes Albert
--
\"in our communism country Viet Nam, people are forced to be
alive and in the western country like US, people are free to
die from Covid 19 lol\" duc ha
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst