Technical

2-speed hub motors, E-matic and Xiongda

This is an important development for E-bikes, but they have not yet evolved into their final form. These are relevant because hub motors remain the simplest, easiest, and most affordable way to electrify a bicycle. When we have discussed electric kits that can be affordably added to a bicycle, they generally fall into three categories. Direct-Drive (for silence, or high-performance), geared hubs (for general efficiency and stealth), or non-hub (for street-legal low power limits, or extra steep hill-climbing). A 2-speed

This is an important development for E-bikes, but they have not yet evolved into their final form. These are relevant because hub motors remain the simplest, easiest, and most affordable way to electrify a bicycle. When we have discussed electric kits that can be affordably added to a bicycle, they generally fall into three categories. Direct-Drive (for silence, or high-performance), geared hubs (for general efficiency and stealth), or non-hub (for street-legal low power limits, or extra steep hill-climbing). A 2-speed

 

Motor tech: Learn the Terms-Part 1

Most new E-bikers don’t care about the details inside the motors that we ride, as long as they just work. But occasionally we use terms in our articles to describe some characteristic about electric motors, and we want our readers to understand why one choice is better than another for a given application. This article is part-1 of a two-part series, with this first part covers the basic terms that are used to describe E-bike motors. Here is what part-1

Most new E-bikers don’t care about the details inside the motors that we ride, as long as they just work. But occasionally we use terms in our articles to describe some characteristic about electric motors, and we want our readers to understand why one choice is better than another for a given application. This article is part-1 of a two-part series, with this first part covers the basic terms that are used to describe E-bike motors. Here is what part-1

 

Sine-wave controllers, making hub-motors super quiet

Sine-wave controllers are starting to get some interest, so we thought some of our readers would like to know what the benefits are, so they can decide if one of these is the right choice for them.

Sine-wave controllers are starting to get some interest, so we thought some of our readers would like to know what the benefits are, so they can decide if one of these is the right choice for them.

 

GNG Gen2 750W Mid-Drive Kit Review

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 who have heard about the GNG kits opted for the 1,000W-2,100W  big-brother kit (article about the GNG 1,000W here), that has proven itself to be a very capable and versatile off-roader. The GNG-Gen2 kit featured in this article is listed as the 350W/400W brushless kit depending on which voltage you choose. The GNG 1,000W kit has

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 who have heard about the GNG kits opted for the 1,000W-2,100W  big-brother kit (article about the GNG 1,000W here), that has proven itself to be a very capable and versatile off-roader. The GNG-Gen2 kit featured in this article is listed as the 350W/400W brushless kit depending on which voltage you choose. The GNG 1,000W kit has

 

Is My E-Bike Legal? USA Ebike Law

Disclaimer.  This article is not written by a lawyer, and in no way constitutes legal advice. This article is intended only as a guide to how to look up information that will allow an individual to understand their local laws pertaining to operation of electric bikes.  This story was submitted by non-lawyer Dogman, our electric bike commuting guru, and electricbike.com staff writer. USA Ebike Federal Law   In the USA, it can get very confusing to understand what is legal

Disclaimer.  This article is not written by a lawyer, and in no way constitutes legal advice. This article is intended only as a guide to how to look up information that will allow an individual to understand their local laws pertaining to operation of electric bikes.  This story was submitted by non-lawyer Dogman, our electric bike commuting guru, and electricbike.com staff writer. USA Ebike Federal Law   In the USA, it can get very confusing to understand what is legal

 

The Next Best Ebike Battery for 2013?

There is a recently introduced battery chemistry that we will likely be seeing a lot of soon. Lithium-Nickel-Manganese-Cobalt-Oxide, or LiNiMnCoO2/NMC. Since Asian battery manufacturers have been working on a wide variety of alternative chemistries,

There is a recently introduced battery chemistry that we will likely be seeing a lot of soon. Lithium-Nickel-Manganese-Cobalt-Oxide, or LiNiMnCoO2/NMC. Since Asian battery manufacturers have been working on a wide variety of alternative chemistries,

 

Regenerative Brakes on Ebikes

Regenerative braking is very common on electric cars, and rare on electric bikes. Regen means that the electric motor is used to slow you down when stopping and generating electricity which is fed  back into the battery pack which increases your efficiency and increases range. That is how a Prius is able to get almost as good of gas mileage in stop and go traffic around town as it does on the highway.  Obviously, the regen braking system offered on

Regenerative braking is very common on electric cars, and rare on electric bikes. Regen means that the electric motor is used to slow you down when stopping and generating electricity which is fed  back into the battery pack which increases your efficiency and increases range. That is how a Prius is able to get almost as good of gas mileage in stop and go traffic around town as it does on the highway.  Obviously, the regen braking system offered on

 

DIY non-hub builds, the why and how (part 1)

Common hub motor kits have a simple construction which keeps the price low (especially with Chinese mass-production). The low price and easy installation makes them the big seller by a wide margin.

Common hub motor kits have a simple construction which keeps the price low (especially with Chinese mass-production). The low price and easy installation makes them the big seller by a wide margin.

 

Replacing or Upgrading Hub Motor Wires

This is the first in our series of ebike repair stories. Also, replacing the wires going into your motor is a great first step in hotrodding your hub motor since burned wires is the #1 reason for failure in an overvolted overwatted hub motor. (read our hotrodding hub motor story). For an example how effective such a motor can be, one builder/racer modified his $100 9C motor by upgrading to thicker wires and was the first electric bicycle to finish

This is the first in our series of ebike repair stories. Also, replacing the wires going into your motor is a great first step in hotrodding your hub motor since burned wires is the #1 reason for failure in an overvolted overwatted hub motor. (read our hotrodding hub motor story). For an example how effective such a motor can be, one builder/racer modified his $100 9C motor by upgrading to thicker wires and was the first electric bicycle to finish

 

Torque Sensors on Electric Bikes

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. This is different from a cadence sensor which measures simply how fast you are pedaling. Cheap cadence sensors are what can be found on most pedal assist system (PAS) bikes on the market today. When done right, a torque sensor can make you feel bionic when you ride your ebike. It allows for a more

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. This is different from a cadence sensor which measures simply how fast you are pedaling. Cheap cadence sensors are what can be found on most pedal assist system (PAS) bikes on the market today. When done right, a torque sensor can make you feel bionic when you ride your ebike. It allows for a more