Cape Fear Community College students are utilizing the E-BikeKit™ electric bike kit in the designing and building of their own electric bicycles!   ORIGINAL ARTICLE POSTED by the Port City Daily staff "CFCC student-built electric bikes to be in Azalea Fest parade Some innovative designs by Cape Fear Community College students will be featured in this year’s N.C. Azalea Festival. For the past year, students in CFCC’s mechanical engineering program have been hard...

Most consumers want an e-bike that will accommodate its motor without being too cumbersome and will remain stable in spite of its electronic components. Some consumers want only the most basic of e-bike features, including lights, a cargo rack/basket, and a water bottle holder. Others are focused more heavily on safety features, such as brake type. And still others are concerned with convenience and portability.
E-bikes use rechargeable batteries, electric motors and some form of control. Battery systems in use include sealed lead-acid (SLA), nickel-cadmium (NiCad), nickel-metal hydride (NiMH) or lithium-ion polymer (Li-ion). Batteries vary according to the voltage, total charge capacity (amp hours), weight, the number of charging cycles before performance degrades, and ability to handle over-voltage charging conditions. The energy costs of operating e-bikes are small, but there can be considerable battery replacement costs. The lifespan of a battery pack varies depending on the type of usage. Shallow discharge/recharge cycles will help extend the overall battery life.
The first functioning electric motor was displayed in the early 19th century, though the device constructed by British scientist Michael Faraday did little more than swirl a wire around a magnet when an electric charge was introduced. Still, the concept proved that electricity could do work. Functional electric motors would follow in many forms after that achievement in 1821. Soon scientists and tinkerers around the world, including visionaries such as Nikola Tesla, were experimenting with all manner of electric motors -- some worked with DC power, others with AC. By the end of the century, myriad electric motors had been produced, capable of exerting enough force with enough reliable control that they were practical for use in myriad applications.
Of course, there is room for improvement. There is no handlebar mounted digital display and the only way to tell your speed is to mount a phone or bike computer to the bars. To see your battery life, you have to stop and look to the side of the frame (or risk crashing). The climbing performance was hampered by the drive unit's more abrupt cutoff when the pedals stopped turning. The charger connection is poorly designed and located: we spent a fair amount of time carefully removing mud to get the bike to charge. Overall though, the Specialized still proved to be the test team's favorite for its versatility and well-rounded performance. We loved it and we think you will too, read the full review to find out more about our Editor's Choice Award winning e-MTB.
The Brose motor puts out 250 watts nominally, and can peak up to a max of 460 watts. That’s around half what the 2016 Specialized Turbo S road bike we tested last year develops, but that bike’s much-larger motor sits in the rear hub, which would massively compromise performance on a full-suspension mountain bike like this one. Spend up to the Expert or S-Works spec Turbo Levo and you get a motor that can peak up to 530 watts. 
So i am 15 years old. I drive to school every single day and go to the gym about 4 times a week. My bike is starting to let me down, and in march i will be 16. I want to go immeadietly for my driver license when i can, so i don’t want to study for so long and get my scooter license and pay a couple of thousand to get one, just to do it all over when i go for my driver license. Do you advise me to get my Ebike now? Or wait until i can get my scooter? And if i should get it, do you advise i build my own? I hear it’s like a pc, since you can get the performance of a 2000 dollar ebike with a 600-800 dollar bike you build yourself. Can Anyone advise me on these grounds?
With an electric mountain bike (or e-MTB) that gives you assistance up to 25kph, it’s possible to pack twice as much riding into the same amount of time. Those five great trails that you normally ride after work can now be ridden twice. That boring singletrack climb on your lunchtime loop suddenly becomes the highlight of your day. With the extra push from the motor it’s easy to double the distance covered, or do the same ride in half the time.
Focus manage to offer both one of the lightest all-mountain capable e-MTBs and also one of the greatest battery ranges. How do they do it? Simple. A smaller-than-most, 378Wh battery is integrated into the frame (the other bikes in this list feature a battery around 500Wh). Another, optional, 378Wh battery also attaches externally within the mainframe. It’s a novel idea, and the bike is noticeably more playful than some others in its lightweight guise. 
Government agencies like the USDA National Forests and the Bureau of Land Management should distinguish between electric pedal-assist eBikes (Type 1) and self-propelled eBikes (Type 2). The former are still human-powered whereas the latter are fully motorized like a motorcycle. Some states like California are already recognizing the different classifications of eBikes and allowing some on trails while prohibiting others. This clear distinction should help us avoid expanding our mountain bike trails to motorcycles, or worse yet, have trails that are currently open to mountain bikes relegated to “hiking only.”
Name a type of riding, and there’s an e-bike for that. If you have zero interest in an electric road bike, you may find yourself head over heels for a high-capacity e-cargo bike that can haul 400 pounds of stuff while still cruising at a cool 15 mph. E-bikes are available in fat, cargo, commuter, recreational, hardtail, full-suspension mountain, and even performance road bike styles. For proof, here are a dozen e-bikes we love for every type of cyclist.
I used to mountain bike quite a lot. I was a fairly strong 17 stone (238lb) weightlifter and rode pretty fast but didn't go in for big air or jumps. Nevertheless I used to break bikes at a ridiculous rate. I broke the bottom bracket off a Marin titanium frame, I broke the bottom bracket off of a Roberts hand built mountain bike. I snapped 2 pairs of handlebars, broke cranks, pedals, chains, wheels, spokes and forks etc etc.
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All models of the Turbo Levo use a frame made from M5 aluminum alloy, with the motor and removable battery integrated inside. The frame and fork use 148mm (rear) and 110mm (front) spacing. Specialized 6Fattie Purgatory (front) and Ground Control (rear) 3-inch wide tires are laced to 38mm Roval Traverse rims. Rear stays and pivots are beefed up to handle the additional weight (48.5 lbs) and torque, and bridges are added to the stays, over the non-motorized Stumpjumper. The front fork is a RockShox Yari XC with a 15mm thru-axle. The 135mm rear travel is provided by a custom Fox Float Performance DPS shock with automatic sag adjust. 

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Often times, carbon gets all of the attention, but as our Senior Advanced R&D Engineer, Chuck Teixeira, says, 'If you haven't ridden an aluminum bike lately, you haven't ridden an aluminum bike.' And the same reigns true for the Men's Chisel. It packs some serious XC-prowess into an aluminum frame, making it the most durable, value-packed XC bike out there.
When all was said and done, the Commencal Meta Power Race 650B+ proved to have everyone's favorite e-bike controls. Commencal uses the Shimano Steps E8000 motor and system which features ergonomic thumb shifters, a small but easy to read digital display and a secure and straightforward charging connection. The ergonomic shifter of the Shimano system is better than the electronic buttons found on both the Specialized, HaiBike and Trek. The Commencal's best-in-the-test digital display also proved to be a favorite for its small size and out of the way mounting location, easy to read at-a-glance information, and color-coded support settings information. The HaiBike's Yamaha PW-X motor and system also featured a digital display, but testers thought it was a little too big, displayed too much information, was more challenging to read, and generally felt a little more clunky and less refined than the Shimano system. That Trek Powerfly's Bosch Purion shifter and display unit was easy to read and had a bright screen, but was in a less visible location on the left side of the handlebar. Our Editor's Choice Award winner, the Specialized Turbo Levo FSR Comp 6Fattie scored the lowest in this rating due to the lack of a handlebar mounted display and a less user-friendly charging connection.
The Shiv TT boasts an aerodynamic frame that observes the letter, but not the spirit, of the UCI's laws on position and frame shapes. Its profile has been refined in our Win Tunnel to take crosswinds in stride, and the wide range of fit options in the integrated cockpit lets riders find a fast, comfortable position for putting out power. Impressively, this is done without causing time-eating instability in tight corners or on technical descents.
When did mountain biking get so uptight? As we see it, fun is a right, and no matter where or when you're riding, it should always be at the heart of each pedal stroke. So whether you're on singletrack, sand, or snow, the Fatboy will deliver a good time. It has tire clearance for up to five inches, a lightweight M4 aluminum frame, snappy handling, and rack mounts that make it adventure-ready, the question is, 'what's taken you so long?'

Fat E-Trike from Sun and E-BikeKit™ at Interbike 2014 Fat bikes and electric bikes were all the rage this year at interbike in Las Vegas. It seemed almost every bike vendor at the show has at least one fat bike model in their booth this year. On top of the fats were the electric bikes. And I think it goes without saying that nobody wants to actually pedal a fat...
It means you can fit much more riding into one session. Or if you want to cover more distance (as often the best riding spots are quite far apart here in the UK) e mountain bikes are perfect for the job. All the usual MTB configurations are available – everything from wheel size to forks and more, and there’s the choice of hardtail or full suspension electric mountain bike too.
The Shiv is a truly triathlon-specific bike. Not only have the frameset and integrated cockpit been honed in our Win Tunnel, shaping its crosswind-optimized design, but we've also worked to keep the athlete as aero as possible. That's why we created an integrated hydration bladder and hid it in the frame, while also providing built-in storage for food and tools. This way, there's no need to break the aero tuck to drink or eat.
Two bikes clearly set themselves apart from the rest of the test field: the brand-new BULLS E-CORE EVO EN Di2 and the Specialized Turbo Levo S-Works Carbon. Both brands are huge players with great innovative power, and you can tell this from their bikes. The BULLS impressed with its cleverly thought-out modular battery concept, top-end, well-considered spec, and very balanced handling. “Climb aboard and feel at home” is its tagline. Thanks to the 180 mm of travel, the bike offers plenty of reserves for those larger hits, yet still feels agile and playful. With this brilliant combination, the € 6,499 BULLS secures itself the desired Best Value tip!
The suspension works, but there isn’t any true dampening. That means you’re just riding around on springs. On a real full suspension e-bike (i.e. a few thousand dollars) you get actual oil-dampened shocks. Those absorb bumps and dampen the shock. With springs, the bike bounces a few times after bumps, with the energy dissipating through the spring stretching and compressing.
Prodeco V5 Phantom X2 8 Speed Folding Electric Bicycle is constructed and tested in the USA. Travelling on a bike is sometimes very comfortable to get some fresh air. This bike is the one that is designed by keeping your needs in mind. It allows you to fold the bike in a compact form and can carry it in the office, basements, flats, etc. The Prodeco V5 Phantom X2 bicycle has avid BB7 disc brakes, 500-watt motor, 12Ah battery, and rigid frame. The manufacturers offer a lifetime warranty on the frame and 2 years on components.
Controllers for brushed motors: Brushed motors are also used in e-bikes but are becoming less common due to their intrinsic lower efficiency. Controllers for brushed motors however are much simpler and cheaper due to the fact they don't require hall sensor feedback and are typically designed to be open-loop controllers. Some controllers can handle multiple voltages.
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