My left crank arm came loose and seems to have damaged the square bottom bracket mount. I assumed the bottom bracket was just a standard square taper, but noticed it says “8fun” on it. However, I can’t seem to find an 8fun bottom bracket available online, so I can’t figure out what part I need—I suspect there is a something obvious that I’m missing. Any ideas to get me back on the road? Thanks all.


Alec wants your wheels to be strong and true when they leave our doors, and a well-built wheel will stay that way for years.  Alec would rather be outdoors, but he comes in to E-BikeKit each day to make sure that you’ve got what you need to make your own outdoor adventures happen. A day when Alec can keep you rolling down the road and enjoying your bike is a...

As a household name, Specialized is to be trusted in this world without a doubt. That’s because, in addition to their inventory of pedal-powered machinery, they’ve gone ahead and introduced us to their S-Works Turbo. Here, in conjunction with their custom Trail-tuned motor for off-road use, the Levo FSR frame is constructed entirely of FACT 11m carbon fiber allowing for both a lightweight and stiff ride through the local wilderness. Additional features include instant engagement, heat management, and a silent output for good measure. Not bad Specialized. Not bad at all.
Looking for electric mountain bikes? Propel has you covered. We carry many different types, most of which have a center drive motor since they perform best on the trail and they’re great for climbing. Our bikes have motor systems from leading manufacturers including, Bosch, Shimano, Brose and Yamaha. Most electric mountain bikes or EMTB’s are limited to 20 mph, but some do go up to 28 mph. We carry many different types listed by category below. We have full suspension, hardtail, fat tire, carbon fiber eMTB.
A low-mounted motor keeps the centre of gravity low and the entire system compact, while allowing for ultra-short chainstays and a bottom bracket that is integral to the frame. We use a high efficiency, three-phase brushless motor to provide class-leading torque and ultra quiet operation. To get instant power response on trail, we put the torque sensor between the chainring and the drive gear, and our 48v battery voltage allows for super fast charging.
There’s a feeling people get when everything just clicks on a ride, and the Roll is a bike that pulls it all together for you. Take it on a bike path and enjoy the smooth ride afforded by a lightweight frame and Ground Control Positioning. Feel the confidence a wider, more stable tire provides. And ride longer with the Body Geometry science that’s gone into the saddles, grips, and pedals. Get out there, get active, and feel it for yourself.
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.

From the tropics to the polar caps, Stark Drive is designed to handle a broad range of temperature conditions with a ruggedized frame and high quality battery pack as well as all terrain tires (standard) or even our fat tire model. Take Stark Drive with you wherever you go. When Designing Stark Drive in Stockholm Sweden we were very conscious of the fact that weather effects battery life on your electric bike so we designed our electric bike with this in mind.
Just take a look at the Kenevo and you know it wants to go fast. Downhill. And probably destroy every turn it sees. The tank-like aesthetic and aggressive geometry does indeed allude to the bikes intended purpose. If downhills are your thing, the burly Kenevo is your friend: it’ll get you to the top with ease but, once the seat drops, you won’t be able to stop it. There’s not a lot more to be said about it – the best in its class…
After you decide which style of e-bike you want, consider the class. In the US, there are three classes defined by the type of assist and how fast the motor will propel you. Most electric bikes sold are class 1 or 3. Class 1 bikes have a motor (max 750w) that assists while you're pedaling, up to 20 mph. Class 3, also known as “speed pedelec” can also have up to a 750w motor, but it can assist you up to 28mph. Both of those are allowed in most states and cities without license. Class 2 have throttles that don't require you to pedal to get a boost. They're allowed on most streets, bike lanes, and paths, but less popular than the other classes and not covered much here (because we still love to pedal and the greater distances pedal assist bikes can cover).
Consider, too, that more than half of all driving trips are shorter than 10 miles, with some surveys reporting that the average single trip amounts to just 5.95 miles. That’s a no-brainer distance to cover by e-bike. In fact, the survey found that owners replaced 46 percent of their car commutes and 30 percent of their driving errands with e-bike rides. All you need is a great commuter bag to carry your stuff, and you’re set.
E-Bikes are a new segment of cycling in Moab. Since an E-Bike is considered motorized by the local BLM and Forest Service, there are rules and laws on where you are allowed to ride. E-bikes are not allowed on most of the singletrack trails in and around the Moab area including the paved bike paths running along highway 191, the river road (HWY 128) and throughout the city of Moab.

The Espin is powered by a 350-watt motor that’s rated for trips up to 50 miles (depending on the terrain and assist level). Once depleted, the battery fully charges in roughly five hours. Thankfully, Espin makes it easy to remove the battery, allowing you to quickly recharge it at home or in the office between trips. A backlit LCD control hub displays your basic metrics and battery life while in transit and LED headlights add a touch of light when needed.

Many many thanks for your wonderful customer services, and a wonderful bike you had prepared for me.  Now, this bike becomes my physical therapy machine and a commuting transportation in the busy streets of San Francisco. Truly, the R15 upgrade is a very powerful e-bike.  I can practically say that this bike is a hybrid of motorcycle and bicycle.  The… Read more ““Just no comparison””

With 170mm travel, aggressive angles and Shimano’s superbly calibrated STEPS motor, the Focus Sam2 is an enduro bike with a built-in shuttle. With the bolt on TEC pack you really can climb to new heights, but without it the smaller capacity internal battery means you need to be ultra economical with your energy use. It’s also frustrating that the internal battery can’t be removed easily for charging. By far the biggest frustration with the Jam2 though is that the sizing isn’t very generous and standover clearance is limited. It’s still a great e-bike, but when you’re spending this much money, you can afford to be fussy.
While GM and Tesla are getting their toes wet, or at least implying that they might, and Ducati is at the table with a serious range of electric bikes, Yamaha is the Japanese entrant to the market. But this isn’t new news. The company has sold over 2 million electric bicycles globally, as well as 4 million drive units. It is a big player in this space and has been since it started. As with Ducati, you can’t buy an electric motorcycle from the motorcycle-heavy brand, but you can power up hills on road and off with one of their motorized products.

As the CleanTechnica series has been showing, electric bikes are an increasingly big business, and becoming the dominant form of motorized two-wheel transportation globally. The innovation, design, and money is flowing to electric bicycles much more than motorcycles. This is part and parcel of our increasing urbanization and demographic shifts globally. Electric bikes just make sense. They shorten commutes, they flatten hills, they make groceries and children light, they are fun, and they are clean, silent, and convenient.


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.
In the 1890s, electric bicycles were documented within various U.S. patents. For example, on 31 December 1895, Ogden Bolton Jr. was granted U.S. Patent 552,271 for a battery-powered bicycle with "6-pole brush-and-commutator direct current (DC) hub motor mounted in the rear wheel". There were no gears and the motor could draw up to 100 amperes (A) from a 10-volt battery.[5]
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