The National Institute for Transportation and Communities believes ebikes remove barriers to cycling, such as physical limitations and challenging topography. The results of a recent survey “indicate that, by reducing the physical demands on the rider, e-bikes are encouraging more people to replace car trips with bike trips,” it says. The survey found that 37 percent of frequent cyclists and 27 percent of non- or seldom-cyclists who bought an ebike now primarily use their ebike to commute to work, an encouraging sign for transportation officials who want to increase bicycle commuting. (May 18 is National Bike to Work Day.)
Gearing: none (many hub motors, one motor revolution = one wheel revolution), fixed gear reduction for more torque, varies when geared motor drives the chain through the bicycle gears which increases torque about 50% (in low gear) for better hill-climbing and offers better top-end speed (in high gear) than direct drive systems using motors of similar wattage.
The Focus comes with lots of extras: front and rear lights, bell, fenders, chain guard and rack. The Panasonic drive system that powers it is the same unit that was on the Kalkhoff bike that climbed to the top of the Pikes Peak bicycle race, one of only 3 types of bikes to survive this 8000 foot 20-mile climb in 2012. The Panasonic drive system is a well built piece of E-bike engineering which drives the bottom bracket and powers the rear wheel through the same drive chain as the rider. It is only available on OEM bikes which have been-purpose built using it. It stands as one of the most refined mid-drive systems ever built.

The Dash is an excellent, low-cost option for those looking for an intro to e-bikes kind of ride. The TranzX motor will take you up to 28mph for about 16-35 miles per charge–more if you’re conservative with the assist. The components aren’t too shabby either. Shimano M365 hydraulic disc brakes keep you safe, the Shimano Deore SGS drivetrain, and RockShox Paragon fork with 65mm of travel make it a great entry level option.
The F1-trained engineers at William Advanced Engineering assisted with the electrical parts and the result is a 250W motor that provides pedal assistance via the front hub – which is a highly unusual approach –  drawing power from a 300Wh battery pack that sits in a bag and goes on the front where the Brompton luggage rack would normally sit. You can also opt for a larger bag that holds both the battery and your spare suit or laptop or whatever. 
The Cyrusher doesn’t have the reliable Bosch motor that higher-end bikes sport and the Samsung battery is only good for around 500 recharges, which is less than you’d expect for a lithium battery. But with the low price point, there are bound to be some compromises. A great option if you want a decent, all-around model for easy trails or commuting.
Electric Motor. Having a battery that will last long is just one piece of the puzzle. The electric motor should be powerful enough to move the bike on flat surfaces without any problems and to overcome some low-steep slopes. It will help you out on steeper slopes, it won’t let you down. If the motor or “the engine” is more powerful you’ll be able to accelerate faster and to reach a higher momentum. This will allow you to reach your destination faster and without you getting tired.
After suffering a back injury and returning home as a disabled combat veteran, Chris found himself unable to exercise the way he had in the past. It was particularly discouraging to be kept from riding his beloved bicycles. Rather than dwell on his misfortune, he decided to search for viable alternatives. It wasn’t long before he settled on his first electric-assisted bike. His passion for bicycles was reinvigorated and he realized he had to share it with the world.

There are two basic categories of electric bike, and their uses don't offer equal crossover value. The first category is essentially a normal bicycle that has been outfitted with an electric motor. These bikes are the same size as a standard bicycle, and handle almost identically, save for the obvious benefit of added motive power thanks to a motor and battery.
As a counterbalance to the cute utilitarian bikes above, the Specialized Turbo Levo FSR Comp is a big, bad, and burly mountain bike. With 27.5-inch wheels, massive 2.8-inch tires, 150mm of travel in the front and 135mm of travel in the rear this bike is made to shred. The Specialized 1.3 Rx Trail-Tuned motor is designed specifically for off-road riding and features a double freehweel design that disengages the gear box at top speed to reduce friction while ripping downhill. The low center of gravity and stout parts make this one a relatively nimble handler that is ready for the rowdiest downhills.
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Electric Hybrid Bikes- As the name suggests, these bikes combine the properties of mountain and fat-tire bikes. They are built to be fast and, at the same time, tough. They are lighter than electric mountain bikes, so you don’t have to deal with the excess weight when going up hills. You can use the bike to carry heavy luggage or cycle through rough trails.

Bicycles featuring pedal power were developed during the subsequent decades of the 19th century, with the most emblematic example being the bicycle we know today as the Penny-Farthing. The bike was named based on the substantial difference in its wheel size resembling the larger and smaller Penny and Farthing coins, respectively. These bicycles were wildly popular among the well heeled upper classes of Europe and America despite their penchant for launching riders head first over the large wheel, not to mention their relative difficulty to mount and dismount.
BATTERY POWER  The Lithium-Ion Manganese battery power pack is lightweight, technologically advanced, and safe.  EcoBike battery packs are UL and CE approved, exceeding safety and quality standards in the U.S. and E.U.  EcoBike batteries are specially designed and manufactured for the EcoBike by a subsidiary of Lenovo / IBM ThinkPad.  These batteries deliver the maximum consistent output and longevity.  EcoBike batteries have been tested and proven, with over 100,000 units manufactured and a failure rate of less than 1%.

Ironically, not only would a US e-bike manufacturer need to import the raw materials for their frames, but they could still be subject to import tariffs that the Trump administration has placed on imported steel and aluminum from China. Thus, the e-bikes could end up even more expensive than just US-built e-bikes, as customers would also have to pay for the higher cost of the imported raw materials.
Out on the road the Soho is easy to fire up, just press the button hidden under the top tube (a nice discreet touch), you’ll then get a set of five top-tube mounted LED’s light up to give you a charge indication. First impressions were that the engagement of the motor is a little jerky in tight traffic (tested in central London) and you could find yourself pulled toward the cars you’re weaving though at slow speeds - unless you’re feathering the brakes.
Cargo bikes and city bikes are common in the e-bike space, but until recently we haven’t seen that many performance road bikes. The Giant Road E+1 is a pedal-assist performance road bike that’s made for more than just commuting; the powerful motor can rank you up to 28mph very quickly on the highest setting so you can rip the flats, join your local group ride, or blast through the mountains with far less effort than a traditional road bike. Don't expect it to feel like a 16lb race bike when you lean it into high-speed turns, but the endurance-oriented geometry allows for an aggressive position on the bike and keeps the it nimble and agile at high speed.