The electric bike kits are the best solution for those who want to transform their bicycle into a pedal-assisted model; they are also useful for those who already own an electric bike and need to repair it or improve its performance.

For those who do not have a big budget to invest in an electric model, the conversion kit represents a cheaper solution to obtain the same advantage, therefore to pedal with less effort.

The most important element of the kit is the engine, which can be positioned in the central part of the frame, on the front or on the rear; usually there is no battery and charger, which must be purchased separately.

Right here are the Best Electric Bike Kits listed below.

RANK NO. 1
48V 1500W Electric Bike Conversion Kit Alloy 26" 27.5" 28" Brushless Gearless Rear Hub Motor Wheel 35A Controller with LCD Display Throttle Powerful ebike Kits for MTB Tricycle Road Bike
  • 【COST-EFFECTIVE】With this product, you can easily convert ordinary bicycles into electric bicycles. This link have 48V 20Ah LG battery, if you need can purchase separately. The products are shipped from China, the tariffs are borne by the merchants, and can be reached within 7-14 working days.
  • 【POWERFUL MOTOR】26inch 27.5inch 28inch 48V 1500W motor wheel(no tire),speed about 28-31mph(45-50km/h),Rear Hub dropout: 135mm;Torque: 70N.m; 480RPM max,good ability to climb the hills.
  • 【STABLE CONTROLLER】KT Brand 35A brushless controller, more stable, high efficiency, low current consumption and long life. The kit includes thumb and handlebar throttle, you can replace it at will. 8PAS will make your ride easier.
  • 【LCD DISPLAY】We have three kinds lcd display, you need to choose.It offers battery percentage, speed, total and single trip distance function etc.The functions of LCD3, LCD6 and LCD5 are basically the same, but LCD6 has a USB interface, which can charge the mobile phone, LCD3 and LCD5 can not.
  • 【PACKAGE】48V 1500W motor wheel, 35A controller, LCD3 OR LCD5 OR LCD6 display, thumb and handlebar throttle, 8PAS, 7-speed freewheel, e-brake, controller bag, torsion arm. If you have no experience in install the wheel kit, it is recommended not to buy it.
RANK NO. 2
DONSU Bicycle Motor Conversion Kit, Front Wheel Electric Bicycle Motor Conversion Kit Hub Motor with Battery for 26" 36V Tire E-Bike
  • ✇This is a Bicycle Motor Conversion Kit, made of good quality materials.High power motor, 36V 1500W, endurance, make you fully enjoy the pleasure of riding.
  • ✇Power + control drive + power source Trinity bicycle wheel for a variety of models (26-inch wheels).
  • ✇Brake system: Suitable for all mechanical brake systems, and automatic detection of speed drop, intelligent intervention in electronic brakes
  • ✇It also has a USB external charging interface, which can also supply power to mobile phones, night lights, etc., and has a fixed-speed battery life that makes it easy for users to ride!
  • ✇As long as the front wheel seconds change intelligent electric power, it can not only use electric power, but also enable pure electric riding mode, realize human-computer interaction, battery quick release, intelligently detect the working state of vehicles and parts, feedback driving speed and mileage, the failure of bicycle!
RANK NO. 3
Voilamart Electric Bicycle Wheel Kit 26" Front Wheel 48V 1000W E-Bike Conversion Kit, Cycling Hub Motor with Intelligent Controller and PAS System for Road Bike
  • 48V 1000W Powerful brushless gearless motor with 28mph (45km/h) speed; Restricted to 750W and 24mph (38km/h) speed by default as a road-legal pedal bike conversion kit.
  • Pedal Assistance System (PAS): enjoy cycling while driving electric bike with 330-440LB / 150-200KG Max Load Capacity.
  • Brake Levers cut off the power supply to the motor safely; Twist throttle has battery level display
  • Comes with all the components you need to a full conversion, including Front Wheel, Motor Controller, Controller Bag, Pedal Assist Crank Sensor, Cable Ties & Plastic Coil, Twist Throttle, One Pair of Brake Handles, Manual. (Note: Battery not included)
  • CE, EN15194 approved; 48 Volt electrokinetic cell battery with a nominal capacity not less than 11.6Ah is required.
RANK NO. 4
EBIKELING 48V 1200W 26" Direct Drive Rear Waterproof Electric Bicycle Conversion Kit (Rear/LCD/Twist)
  • Please ensure you select a specific variant from size and style. By default, the first variant of each option will be selected. Easily convert your bicycle to an e-Bike. Kits are ready to install with aluminum double walled rim and hub motor already attached. All you need to do is to transfer original tire.
  • Kits include all necessary components for installation; Motor/Wheel, controller, LED display, throttle, brake levers, pedal assist sensor, torque arm, and cable ties. Battery and tire is not included.
  • Upgrade to LCD Display. It offers battery percentage, speed, total and single trip distance, wattage, PAS levels, headlight switch, and potential error codes for easier troubleshooting.
  • Continue to pedal: Pedal Assist Sensor (PAS) allows you to ride without throttle response. You may choose to operate your e-Bike either way. Going on a lengthy trip? Avoid uncomfortable wrist positions and simply pedal anytime, anywhere.
  • We offer a 3 month warranty on all components included in the conversion kit. We provide technical support and hassle-free returns, full refund or replacements. We strive to ensure your satisfaction in our service and products.
RANK NO. 5
Bafang 48V 750W Mid Drive Electric Bike Conversion Kit with HMI Display BBS02B 8FUN Mid Motor for Bike Kit with 48V Ebike Battery
  • [Easy Installation]: The Bafang 750W Mid-drive conversion kit can be installed on a standard bike frame easily.
  • [Powerful]: High starting torque, Max torque≥160Nm, good performance on climbing.
  • [Safety]: Double clutch is used on the drive unit, more safety. Speed sensor and torque sensor can be applied, controller integrated.
  • [All Included]: It comes with everything that you need to convert your electric bicycle and ready to enjoy the freedom of climbing up hills without any problem. NOTICE: brake lever (IN default, Fulfilled by Amazon are all packed with the brake levers, can't change to brake sensors). If you want the brake sensor for hydraulic brake, send an email to change, shipped by the seller.
  • [Service Available]: Shipped by DHL. Usually arrives in 3-7 days. With 1 year Service for the mid-drive motor, no worry about using it.
RANK NO. 6
BAFANG 48V 750W BBS02B E-Bike Conversion Motor Kit DIY Electric Bike Kit with Battery and Charger
  • 【Complete Accessories】 Comes with all necessary accessories:Mid-drive motor BBS02B 48V 750W,brake lever,thumb throttle,chainring wheel,crank,LCD display,speed sensor and magnets,1T4 wire,nuts, battery and charger---optional, ebike head light(Free gift)
  • 【Universal Compatible】Bafang BBS02B Mid drive motor kit is compatiable with fatbike,mountain bike,road bike and so on. This kit is designed to fit a standard 68-73mm bottom bracket,please see the last pictures
  • 【Riding Model & Installation】Electric bikes & pedal bicycle, faster traffic & physical exercise can be achieved at the same time; Easy installation, can be completed within 1 hour by watching installation video offered by us
  • 【Global Inventory& Shippment 】We have inventory in US/EU/CA/AU/Russia Warehouse, Fast shipping,3-6 days on item delivery,Please disregard the deadline of delivery on amazon, we are much faster than amazon requirement
  • 【Warranty & Promotion】1 year warranty, 100% replacement or refund if any quality problem within 1 year.North American after-sales service center, providing technical support and maintenance;Free Gift ( tool or light 1pc, 250W stickers 4pcs,Install accessories 1 set), Attention:light and tool are optional, the light in default as a freegift, if you want tool, please tell us by email so that we can add tool instead of the light in package before your order is shipped
RANK NO. 7
BAFANG BBS02B 48V 750W Ebike Motor with LCD Display 8fun Mid Drive Electric Bike Conversion Kit with Battery (850C Display, Motor kit+44T Chainring+Shark Battery 48V 17.5Ah)
  • 🚲 【Global Inventory& Shippment 】We have inventory in US/EU/CA/AU/JA/Russia Warehouse, Fast shipping,3-6 days on item delivery,Please disregard the deadline of delivery on amazon, we are much faster than amazon requirement
  • 🚲 【Complete Accessories】 Comes with all necessary accessories:Mid-drive motor BBS02B 48V 750W,brake lever or brake sensor,thumb throttle,chainring wheel,crank,LCD display, battery and charger (optional),speed sensor and magnets,1T4 wire,locknut,and free gift (ebike tool or headlight, stickes, power extension cable, long bolt and gasket for BB73mm)
  • 🚲 【Universal Compatible】Bafang BBSHD Mid drive motor kit is compatiable with fatbike,mountain bike,road bike and so on. This kit is designed to fit a standard 68-73mm bottom bracket.
  • 🚲 【Easy Installation & Two Riding Model】 Easily convert your pedal bike into a motorized bike within 1 hour. We will offer a installation video; Two riding Model (E-bike & Pedal Assisted bicycle) for you to choose, you can choose the E-bike to enjoy a long time travel, and also exercise.
  • 🚲 【Warranty & Promotion】1 year warranty, 100% replacement or refund if any quality problem within 1 year.North American after-sales service center, providing technical support and maintenance;Free Gift ( tool or light 1pc, 250W stickers 4pcs,Install accessories 1 set), Attention:light and tool are optional, the light in default as a freegift, if you want tool, please tell us by email so that we can add tool instead of the light in package before your order is shipped
RANK NO. 8
8FUN Bafang BBSHD Lastest Model 48V 1000W Ebike Electric Bicycle Motor Mid Drive Electric Bike Conversion Kit
  • [Shipping & Warranty] --- Shipped by FedEx. One year warranty and provide technical support & after-sales service in US. 24-hour online service.
  • [Conversion Accessories] --- All necessary mounting accessories are included. Please see the packing list image. Notice: Brake levers can be changed to hydraulic and mechanical brake sensor--- search ASIN B07B8KNTYN, if you leave us a message about your requirements. But motors in Prime are only packed with brake levers.
  • [Easy Installation] --- Can be successfully installed into an electric bicycle in just a few time by only a few tools which can remove the crankset and the center shaft, as well as tools for installing this mid-drive motor.
  • [Standard JIS] --- Fit a standard JIS 68 - 73 mm/ 100 mm/ 120 mm bottom bracket (installing extra parts Gaskets as gifts), please see the installation image carefully. Suitable for mountain bike, road bike, commuter bike, fat tire bike. NOT recommended to apply this motor to bikes with carbon fiber frame in case of damaging the frame.
  • [Two riding mode] --- Electric bikes & pedal bicycle, faster traffic & physical exercise can be achieved at the same time. A wonderful choice for cycling enthusiasts and those who want faster traffic to transport or travel. This 1000W motor is from the Bafang BBSHD series, providing powerful and ideal power.
RANK NO. 9
EBIKELING 48V 1200W 700C Direct Drive Waterproof Electric Bicycle Front Wheel Ebike Conversion Kit (Front/LCD/Thumb)
  • Please ensure you select a specific variant from size and style. By default, the first variant of each option will be selected. Easily convert your bicycle to an e-Bike. Kits are ready to install with aluminum double walled rim and hub motor already attached. All you need to do is to transfer original tire.
  • Kits include all necessary components for installation; Motor/Wheel, controller, LED display, throttle, brake levers, pedal assist sensor, torque arm, and cable ties. Battery and tire is not included.
  • Upgrade to LCD Display. It offers battery percentage, speed, total and single trip distance, wattage, PAS levels, headlight switch, and potential error codes for easier troubleshooting.
  • Continue to pedal: Pedal Assist Sensor (PAS) allows you to ride without throttle response. You may choose to operate your e-Bike either way. Going on a lengthy trip? Avoid uncomfortable wrist positions and simply pedal anytime, anywhere.
  • We offer a 3 month warranty on all components included in the conversion kit. We provide technical support and hassle-free returns, full refund or replacements. We strive to ensure your satisfaction in our service and products.
RANK NO. 10
RanBB Bicycle Motor Conversion Kit, 26'' 36V Electric Bicycle Front Wheel Conversion Kit E-Bike Front Wheel Motor
  • ✿Power + control drive + power source Trinity bicycle wheel for a variety of models (26-inch wheels).
  • ✿Applicable models: any 26 inch wheel model
  • ✿Brake system: Suitable for all mechanical brake systems, and automatic detection of speed drop, intelligent intervention in electronic brakes
  • ✿As long as the front wheel seconds change intelligent electric power, it can not only use electric power, but also enable pure electric riding mode, realize human-computer interaction, battery quick release, intelligently detect the working state of vehicles and parts, feedback driving speed and mileage, the failure of bicycle!
  • ✿It also has a USB external charging interface, which can also supply power to mobile phones, night lights, etc., and has a fixed-speed battery life that makes it easy for users to ride!

Decisive Factors for The Choice of The Electric Bike Kits

Electric bicycle side structure

On the net as elsewhere, the term electric bicycle and its English version e-bike are used indiscriminately to indicate both self-operating and pedal-assisted electric bicycles (the latter also called pedelec, pipa or pas).

In reality it is good to specify that the European directive 2002/24 / CE defines which electric bicycles can be defined as a pedal-assisted. The characteristics are as follows:

Have a Nominal Power Lower than 250 W

Activate yourself and only in conjunction with the ride. With the pedals stopped, the engine must also stop automatically

Deliver maximum power at low speeds and then gradually decrease, until it stops at the speed of 25 km / h

We with the term electric bicycle will always refer to pedal-assisted bicycles. Despite its ambiguity, we have preferred to use this term because it is more immediate and easier to understand.

However, we always recommend paying close attention to the technical specifications before purchasing an electric bicycle, in order to avoid bad surprises or risk incurring fines and penalties.

Where Can the Electric Bicycle Circulate?

As we said, electric bicycles are divided between pedal-assisted and autonomously operated bikes. Electric bicycles with pedal assistance can circulate on the road like traditional bikes and therefore are not subject to particular limitations. To drive autonomous electric bikes, on the other hand, you must have an AM license.

1. Engine

The first factor to consider when choosing an electric bicycle is definitely the engine, because it is undoubtedly the central component of this type of product.

Before seeing in detail the characteristics on the basis of which we suggest you evaluate the motor of an electric bicycle, we want to make a small clarification, explaining how the belonging of a product to the family of electric bicycles depends on the type of motor.

We now see in the next sections the specific characteristics of the engine that influence its performance, and that we suggest evaluating in the choice of the electric bicycle.

Electric Bicycle Power

We have seen how, due to the regulations listed above, it is not possible for an electric bicycle to mount a motor with a rated power greater than 250 W, however, it is also rare to find motors with a lower power.

The power indication is also associated with the battery voltage, so the data that we will find on the technical datasheet of our bicycle will be for example 250W / 24V, or 250W / 36V.

For the purpose of the power supplied by the motor, the voltage does not change anything, but it will be useful to keep this in mind when the battery needs to be replaced.

It should also be remembered that upon reaching the speed of 25 km / h the engine will stop: this does not mean that it will no longer be possible to continue pedaling, but that the speed maintained will only be given by the strength of the legs, at least until you have returned below the 25 km / h limit.

Type of Engine

There are two types of bicycle engine:

  1. Brushed: which are alternating current and are the most obsolete as they are heavier, bulkier and less efficient;
  2. : which are direct current, lighter and more performing.

Position of The Engine

The engine position itself must also be taken into consideration. The engine can in fact be located on the hub (the center of the wheel where the spokes converge) of the front wheel, on the hub of the rear wheel, or in a central position, or on the pin where the pedals are inserted. electric bicycle see how the positioning of the engine affects the performance of the bicycle:

  • Front Motor: the motor located on the front wheel hub is certainly the easiest to assemble because it does not get in the way of the chain and pedals. However, this positioning modifies the traction of the bicycle, which would naturally be rear, and can create an imbalance in the distribution of the weights and some difficulties in driving. For example in case of rain, on steep climbs or on dirt roads, the front wheel will risk losing grip, and being the driving one it could slip making the bicycle less stable;
  • Rear Engine: with the rear engine there are no slipping problems, as the traction of the bicycle is not changed, but we would like to point out that due to its proximity to the gearbox gears such an engine could be more inconvenient to assemble. This is not only a problem for the manufacturer, but also for the cyclist himself, who in the event of having to replace the wheel in the event of a puncture should first disconnect the motor cable;
  • Central Engine: it is the most practical solution, but also the most expensive. While the hub motors can also be mounted on standard bicycles (there are numerous conversion kits on the market), the central motor cannot be mounted later, therefore the frame itself must also have a specific structure to accommodate it, with very few exceptions. In our opinion this represents the best solution, because the engine positioned in this way does not interfere with the assembly or disassembly of the wheels and can be combined with both torsion sensors and pedaling sensors (which we will discuss later).

How the Electric Bicycle Works

As we explained in the previous paragraph, the engine can be mounted in different positions but the operation always remains the same. In pedal-assisted electric bicycles the engine starts when pressure is applied to the pedals.

In this way considerable speeds can be achieved even with minimal effort. Self-operating electric bicycles, on the other hand, work like a small motor: the motor can start running at any time regardless of the use of the pedals.

2. Battery

Closely connected to the engine is the battery. It determines the autonomy of the electric bicycle, i.e. the time and kilometers for which it will be possible to use it before having to recharge it. electric bicycle battery housing. In the list below we see what are the parameters on the basis of which the efficiency of a battery can be assessed :

  1. Technology: batteries can be nickel-metal hydride (Ni-MH), lead gel or lithium. Without going into too much detail, the best are certainly lithium batteries, as they are the ones that guarantee the best weight/capacity ratio. This means that, if compared to lead or nickel batteries, lithium batteries will be the lightest with the same capacity. Furthermore, with the same autonomy, lithium batteries require a shorter charging time;
  2. Capacity: the capacity of a battery indicates the amount of Watts it can deliver per hour (it is indicated in Watt-hours, Wh). The quantity of Wh therefore indicates how much energy the battery can supply to the bicycle’s engine. Clearly, the more assistance we will ask the engine, the less battery life will be. To calculate the capacity of a battery, just multiply the voltage (V) of the battery by the intensity of the current per hour (Ah), therefore a 36 V and 10 Ah battery will have a capacity of 360 Wh. Below 360 Wh we can speak of a low capacity battery, while above 450 Wh we already speak of high capacity batteries;
  3. Autonomy: calculating the average autonomy of a battery is not easy, because many factors come into play, most of which do not depend on the technical characteristics of the bicycle (weight of the cyclist, the slope of the road, the type of terrain, level of assistance, speed). In addition, the battery itself will age over time, progressively reducing its performance, until it finishes its cycle around the third year. Furthermore, autonomy is linked to the capacity of the battery itself. In general it can be said that modern electric bicycles have a high autonomy if it is greater than 80 km, average if it is between 80 and 50 km, low if less than 50 km;
  4. Position: finally also the position of the battery has its importance, as it affects the balance of the weights of the bicycle. The battery can in fact be positioned either on the luggage rack, or on the triangle of the frame. This second location is preferred, not only because it does not further unbalance the load of the bicycle on the rear wheel, but also because it allows you to free up the space of the luggage rack, on which instead it will be possible to mount a basket or a child seat.

How to Recharge the Electric Bike

Most models allow you to remove the battery to charge it more easily, in any case, there are some precautions to follow to avoid damaging the battery and ensure a long life:

  • Do not charge the battery when it is still hot
  • Keep the battery charged even when it reaches 100%
  • Here are some tips to increase the battery life of the electric bicycle:
  1. Use the maximum assistance level only when climbing
  2. Start in a soft gear and then change when you have gained speed
  3. Check the tire pressure frequently
  4. Avoid carrying excessive weights

3. Pedaling Assistance

Unlike a moped, the engine of an electric bicycle must stop completely with the pedals stopped. Let’s see in the next sections what the sensors that allow this to happen and how to evaluate them.

Detection Sensors

The pedal detection system, therefore, allows you to communicate to the engine control unit when to activate.

There are two types:

Rotation or pedaling sensor: with this type of sensor the consent to the activation of the motor occurs at the same time as pedaling. This means in practice that the sensor sends the ignition signal of the engine only when it detects the movement of the pedals so that the first pedaling after a stop is completely borne by the cyclist.

Already at the second pedaling, however, the engine starts, providing a constant thrust that cannot be modulated according to the assistance level set by the user. This system allows the so-called symbolic pedaling, that is, it is possible to proceed without any real muscle effort, but letting yourself be carried entirely by the motor.

Remember, however, that to return to the category of electric bicycle, the engine will have to stop providing assistance when reaching 25 km / h, and will only be able to reactivate when the speed has fallen below this threshold;

Stress Sensor: this type of sensor detects the pressure exerted by the cyclist on the pedals, and has the advantage of being activated at the same time as the first pedal stroke, as soon as the foot presses on the pedal.

The type of assistance provided is modular, that is, it increases and decreases in relation to the effort we are making. This on the one hand makes pedaling more natural and that the cyclist is subjected to real physical exercise however light.

On the other hand, it is not possible to let yourself be carried entirely by the engine, since it stops as soon as it stops detecting the pressure on the pedals.

Although there is no absolute best sensor, since much depends on your needs and the use you want to make of the electric bicycle, the effort sensor has the undoubted advantage of keeping circulation and muscles active, and it is an excellent physical exercise for the less trained.

Assistance Levels

Both sensors can offer different levels of pedal assistance. It ranges from a minimum of two levels to grow, with an average between 3 and 5. Clearly, the greater the choice, the greater the possibility of adjusting the thrust we want to receive from the engine.

An engine with more than 5 assistance levels can be considered of high quality, while below 3 we are talking about low-performance economic engines.

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