In a parallel hybrid motorized bicycle, such as the aforementioned 1897 invention by Hosea W. Libbey, human and motor inputs are mechanically coupled either in the bottom bracket, the rear wheel, or the front wheel, whereas in a (mechanical) series hybrid cycle, the human and motor inputs are coupled through differential gearing. In an (electronic) series hybrid cycle, human power is converted into electricity and is fed directly into the motor and mostly additional electricity is supplied from a battery.

I have now done 2700 miles of leisure cycling with a range of up to 40 Miles. Usually I leave the assist control in ECO mode (50% extra torque)for most of the ride but as I live on top of a hill I usually finish the ride in MED (100% extra torque) or HI (150% extra torque). Think of a this type of pedelec as having a torque motor which applies an extra torque that is a multiplier of the torque you are applying to the chain. Mine is coupled to a Shamano Nexus 7 seven speed hub, and is great for always being in the right gear by being able to change gear when stationary.

More powerful pedelecs which are not legally classed as bicycles are dubbed S-Pedelecs (short for Schnell-Pedelecs, i.e. Speedy-Pedelecs) in Germany. These have a motor more powerful than 250 watts and less limited, or unlimited, pedal-assist, i.e. the motor does not stop assisting the rider once 25 km/h has been reached. S-Pedelec class e-bikes are therefore usually classified as mopeds or motorcycles rather than as bicycles and therefore may (depending on the jurisdiction) need to be registered and insured, the rider may need some sort of driver’s license (either car or motorcycle) and motorcycle helmets may have to be worn.[14]

In the theoretical electric bike we considered up above, we had the dynamo/motor driving the back wheel directly, simply by pressing on the tire. Most electric bikes work a different way. They have compact electric motors built into the hub of the back or front wheel (or mounted in the center of the bike and connected to the pedal sprocket). Take a look at the hub of an electric bike and probably you’ll see it’s much fatter and bulkier than on a normal bike. You can read more about how these motors work in our main article about hub motors.

South Korea’s women’s curling team, known as the “Garlic Girls,” became the unexpected stars of the Olympics by reaching the finals. WSJ visited their garlic-producing hometown to understand an improbable curling craze that will be remembered far beyond the Pyeongchang Winter Games.

An exceptionally affordable, feature rich electric bike, built around an approachable frame that’s easier to mount and stand over, offers pedal assist and throttle override operation. The battery pack is protected by the top tube, positioned low and center along the……

Over the years our lineup has grown, and as a result, the offering has become more complicated than it needs to be. Specifically, this year we introduced a 500w geared motor option to the lineup and that has created some redundancy. Before outlining changes, we would like to ensure everyone that we will be stocking enough inventory of previously sold parts for a long enough time to ensure all warranties…

  Finally we are getting somewhere.  I have a bicycle, check.  It has an electric motor, check. I weighed it, and it was 80 pounds, check.  When I rode it, it went 23-MPH.  Whoops!  “Cannot attain a speed of more than 20-MPH”

With clear rules on how and where to ride an e-bike, everyone stands to benefit. Local bicycle shops and manufacturers will see increased business and their customers will no longer be confused; people who already ride e-bikes can more easily understand where to ride; and new bicyclists who may be discouraged from riding a traditional bicycle due to limited physical fitness, age, disability or convenience will have new transportation alternatives.

Marc Gunther has reported on business and sustainability for Fortune, The Guardian, and GreenBiz. He now writes about foundations, nonprofits, and global development on his blog, Nonprofit Chronicles. More about Marc Gunther →

  But it’s pretty easy to limit any e-bikes speed, so the e-bike could be slowed down enough to be legal in any state with a 20-MPH limit. In New Mexico though, nothing will make it a “bike” IF the motor is turned on.  With the motor off, nothing prohibited carrying a motor you are not using on a “bike”.  What’s the difference?  You could pedal legaly on the street, then once off the street, motor happily off road.

The e-bikes in New York should be legalized. This was a very bad idea from somebody to make e-bikes illegal in New York. Making something illegal isn’t to expect that nobody is going to make that thing. Those who made e-bikes illegal in New York should neither expect themselves that nobody is going to ride them there. Riding a gasoline powered motorbike is legal but the e-bikes are illegal in New York, I think this is all ridicilous. New York is one of the world’s biggest cities and there are more vehicles than in London, Stockholm, Warsaw, Berlin or even Gothenburg in Sweden. In all of those cities e-bikes are legal, these cities are named as examples but e-bikes should be legal in New York. They should think more about pollutions and the air quality, this has to be as good as possible in that big cities like New York or even bigger cities. India and China have got real problems with their air quality, especially in the cities where they drive cars and motorbikes a lot. The cargo motorbikes are usual especially in India and those should get replaced by cargo ELECTRIC motorbikes making no pollutions. India and China are the biggest countries in the world and there should be more electric vehicles than gasoline powered vehicles. Today there are batteries that can be charged as fast as refuelling a gasoline powered vehicle, normally 5 minutes. But the batteries get only 50 % of their capacity and charging them that fast all the time will use up them faster than if they will get full charges all the time. Fast charging is also not good for the batteries, it’s better to charge batteries too long. Once I tried charging my mobile phone battery a time that was too long and the battery was longing for a longer time than usually. Too long charges are better than those taking 5 minutes but actually still not the best thing a battery can get. I would recommend to charge the batteries in the time they need mostly and charge them too long sometimes only.

[…] the view during your ride, you could also achieve the recommended weekly exercise if you use the pedal assist mode daily on your electric bicycle. Electric bicycles are also great for the elderly since they do not […]

Photo: Zap Electric’s power-assist kit turns a conventional bike into an electric one. There’s a bolt-on DC electric motor (weighing just over 3kg or 7lb) just above the back wheel, behind the police officer’s foot, pressing against the tire and driving it by simple friction. The motor’s powered by a compact lead-acid battery (weighing about 5.5 kg or 12 lb) inside a protective nylon bag. This kit adds quite bit of weight to the bike, but gives extra range and speed when needed. Photo taken in Santa Rosa, California courtesy of US DOE/NREL.

Want to convert your regular pedal bike into a motorized bike?. Look further, we have found you the perfect conversion kit. This kit comes with a 1000w 48v brushless hub motor, a 26’’ rear wheel, 2 brake pullers, 1 electronic controller and many more.

Light weight design, easy to transport; Eco friendly and safe to use. High quality and long life expectancy; Stored in a sturdy aluminum casing. User friendly and come with holder and charger. Click for Full Description.

An affordable, powerful, electric fat bike with responsive 12-magnet pedal assist and twist-throttle on demand, available in two colors with lots of accessory options including fenders and racks. Only one frame size but the top tube is sloped and the shorter stem pairs……

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“Yamaha is a well-known and respected brand, but the market is already pretty saturated with manufacturers,” Flagg said. “This is a very competitive space. The opportunity for a manufacturer to have a huge impact has probably passed.”