Electric Bike Technologies has been delivering the best experience in electric bike kit conversion since the company was founded in 2008. Driven by a respected founder and a team of dedicated electric bike enthusiasts, the E-BikeKit™ electric bike conversion systems have been sold worldwide to thousands of electric bike riders and fostered partnerships with some of the best brands in the bicycle industry. The company has been featured on NBC’s Good Morning America and the E-BikeKit system is the only electric bike kit system distributed by J&B Importers, the largest bicycle distributor in the United States.
Yes, you read that right – north of £4k for a bike. But then, this is basically the top end of the mountain e-bike market, and you do get a lot of bike for your buck: a Yamaha Lithium battery, masterful Magura brakes, mud-slaying tyres, and – my favourite flourish of all – a hydraulic seat post that you can adjust on the move (surprisingly useful when navigating tricky downhill trails, as it means you can depress the saddle out of the way with the press of a button). 
Glenn has over 15 years of experience building bicycle wheels and has worked for and with the local cycling community in the Philadelphia area for the past 20 years. Glenn is in charge of all wheel building activities at E-BikeKit and oversees quality control on wheels built in the Newportville, PA location. Since joining E-BikeKit in early 2010 Glenn has had a huge impact on the success of the company...
Torque sensors and power controls were developed in the late 1990s. For example, Takada Yutky of Japan filed a patent in 1997 for such a device. In 1992 Vector Services Limited offered and sold an e-bike dubbed Zike.[9] The bicycle included NiCd batteries that were built into a frame member and included an 850 g permanent-magnet motor. Despite the Zike, in 1992 hardly any commercial e-bikes were available.

The Brose motor is definitely the most quiet ebike motor that I’ve used. The 28mph model is no different. I also find it to be pretty solid in terms of power. Generally speaking, Bosch motors are considered the most powerful, but with the Brose I actually think you get a lot of power with a more “real” feeling cycling experience. They also give you a 675 watt hour battery pack, which is still unrivaled in terms of a single battery system.
Because e-bikes are capable of greater speeds for longer periods of time than standard bikes, you want extra control. Wider tires provide traction and some bump absorption with little penalty. You also want strong brakes to slow you (and all that extra weight) easily. It's worth looking at the quality of the brakes and investing in bikes with better ones if you can.
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