Cromotor, Monster Hubmotor for Electric Bik...

Jan 03, 201425 Comments

Zvonimir is an engineer who lives in Croatia, between Italy and Greece on the beautiful Adriatic Sea (ES member HAL9000V2.0). In a recent story, we

AstroFlight 4535, their largest motor yet, ...

Oct 08, 20132 Comments

AstroFlight is a maker of high-end RC motors and components for RC-helicopters and model planes. Their headquarters are located in Irvine, Southern California. This month

GNG Gen2 750W Mid-Drive Kit Review

May 01, 20137 Comments

This is an affordable and useful mid drive, if you think you would be happy with 750W…and live where there are hills. Quite a few buyers

BionX Hub Motor Kit Review

Mar 10, 2013Comments off

The BionX is  the best selling hub motor kit in the United States, and probably  the world. The Bionx is not only sold as a kit,

GNG, an affordable 1,000W Mid Drive Kit

Jan 21, 201325 Comments

We have waited to write about the GNG kit because it proved to be immediately popular (’s leader Eric stumbled across the new GNG site in

Torque Sensors on Electric Bikes

Oct 18, 201222 Comments

A torque sensor is a type of throttle that determines how much juice to feed the motor based on how hard the rider is pedaling.

Recommended E-bike Vendors 2016

Aug 18, 20122 Comments

The electric bike builder marketplace is full of cottage industries.  This is a list of vendors for people who are considering building an electric bike

Three 250 watt hub motors; Cute, Bafang, an...

Aug 09, 201218 Comments

250 watt hub motor are so cool and nifty looking, they made it on our  top 10 list of electric bike porn. Here we will

250 watt hub motor E-bike; Is it Enough?

Aug 08, 201287 Comments

250 watt motors are the most used motor on commercially available electric bikes. They are popular in Europe (and Asia) where in many countries there

Watt Hours; Calculating E-bike Range

Aug 01, 2012125 Comments

Watt hours is a way to measure the energy capacity of a battery pack, so you know what to expect from your new E-bike in