Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Living Car Free Do you live car free or car light? Do you prefer to use alternative transportation (bicycles, walking, other human-powered or public transportation) for everyday activities whenever possible? Discuss your lifestyle here.

User Tag List

Thread Tools Search this Thread
Old 08-04-10, 07:59 AM   #1
Senior Member
Thread Starter
donrhummy's Avatar
Join Date: Dec 2005
Posts: 3,481
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
The Copenhagen Wheel

Very cool idea. Turns your bike into electric-assist, but without any external charging, ever. Instead it uses the energy from braking (not sure how) stored up to give electric assist. But it also does more than that. It works with a smartphone to help you find great routes for bikers, store and share your ride data and more. Pretty cool.
donrhummy is offline   Reply With Quote
Old 08-04-10, 10:26 AM   #2
Sophomoric Member
Roody's Avatar
Join Date: Jan 2005
Location: Dancing in Lansing
Posts: 24,111
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
It looks good, but I'd have to test ride it before paying $600. They talk more about the software--location sensing, route sharing, road condition information--than they talk about the actual mechanics--how well (or even how) the wheel provides an assist to riding.

"Think Outside the Cage"
Roody is offline   Reply With Quote
Old 08-04-10, 08:55 PM   #3
In the right lane
gerv's Avatar
Join Date: Dec 2005
Location: Des Moines
Bikes: 1974 Huffy 3 speed
Posts: 9,567
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Its sleek red hub not only contains a motor, batteries and an internal gear system – helping cyclists overcome hilly terrains and long distances - but also includes environmental and location sensors that provide data for cycling-related mobile applications.
It's an electric bike with a connection to your iPhone. Hope you have a good data plan!

I'd be interested to see its output and to know its weight.

I probably don't need this. As my wife recently pointed out to me, it's all downhill from here.
gerv is offline   Reply With Quote
Old 08-04-10, 09:28 PM   #4
Senior Member
Join Date: Nov 2008
Location: Bay Area, Calif.
Posts: 6,580
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 322 Post(s)
My impression is that it was developed primarily to generate publicity through press releases and never seriously as a marketable product. The idea of reusing energy derived from braking sounds nice, but a major problem is that most cyclists quickly adopt a style of riding where there is very little energy ever lost to braking and therefore even less that can be recovered. Riding in a city with traffic lights I tend to look ahead and anticipate when the light will change. Then I adjust my speed so that I can either make it through on the green or at least have lost most of my speed by coasting before I have to stop at a red. Except for pretty rare times when I mistime the light there isn't much energy that went into the brakes. In hilly terrain there might be more potential for gains, but only if the downhill is either really steep or the cyclist is willing to descend quite slowly. Granted, I do use my brakes some on hilly descents, but most of my potential energy is used to go downhill as fast as possible and is therefore lost to air resistance. Don't know that I'd be willing to putz along slowly on the downhill just so some of the energy could be used to charge up a battery (with some efficiency loss) and then used to power a motor on the next uphill (again with some efficiency loss).
prathmann is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 02:51 PM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.