click here to check the LOYALHEARTDY 72V 2000W conversion kit on amazon has some impressive specifications: 72 volts and 2000 watts. It’s a 20-inch, brushless gearless rear hub motor. We’re talking about a small wheel build that looks like it has real horsepower. For mid-tier money, you know this isn’t just another commuter mod. This is a full-power conversion that wants to ask one question first: do you have a 72-volt battery?
Specs and Build Quality
As we mentioned earlier, this is a 72 volt, 2000 watt, brushless gearless rear hub motor. With no internal gears inside this motor, there are fewer areas where things can wear out. All of the torque produced by the motor is applied directly to the magnetic field. So the motor operates at 560 rpm and produces 60 newton meters of torque. That is the kind of torque that is going to make your 20-inch wheel rolling fast!
The wheel is a 20 x 2.5 – 3.0 inches wide. Most of us are used to seeing wheels that are much wider than this for a 20 inch build. The freehub flywheel has 9-speeds. This allows you to keep using the rear derailleur setup that you currently have on your bike. In short, this means that you don't have to go single-speed.
Aluminum alloy construction helps keep weight down compared to how much power this thing is putting out.
Everything else that comes with the kit is pretty straightforward. Controller bag. LCD display shows speed. Mileage. And error codes. PAS sensor. Throttle. Cruise control module. Brake levers with power-off sensors. Every last piece of hardware plugs into a 72-volt system. What doesn’t come with the kit is the battery. As indicated in the product title, this is a conversion kit. Not a complete package. You will need to purchase a separate 72 volt battery pack.
LCD Controller is pretty simple:
Speed display.
Trip mileage counter.
Error code display.
Set your speed and engage cruise control.
PAS tracks pedal cadence.
Throttle adds hand-control over top speed.
Standard kit fare built cleanly. check current pricing on amazon before you start planning your build.
Installation and Compatibility
This kit is designed for bikes that have dropouts in the rear that will accommodate a 20-inch wheel and a 9-speed freehub. Frame must also accommodate a tire that is between 2.5 and 3.0 inches wide. Make sure to check dropout spacing. Brake mount type. And routing for Controller bag before ordering.
Cassandra Dib, the only amazon reviewer for this kit said: “if an 11-year old kid can build this, then so can you.” that is not a small claim when you consider that you are swapping rear wheels. Wiring up the Controller. Mounting the LCD. Calibrating the PAS sensor. And integrating brake cutoff switches. This build is modular. Color-coded connectors.
Brake levers include power off sensors. When you squeeze them, they instantaneously cut motor power. PAS attaches to either crank or chainstay. Throttle mounts on handlebar. Cruise control button press from LCD.
You must make certain that frame strength exists where needed (i.e., fork, frame). Rigid forks or steel forks strongly recommended for high-torque loads due to use of carbon fiber may cause failure under sustained load conditions like those caused by 2000-watt hub motor. Core users of folding bikes. Custom mini-bikes. Small-wheel MTBs. And city bikes fit within these categories.
Freehub body provided has been specifically engineered for compatibility with 9-speed cassettes. If your bike uses an 11-speed or 12-speed cassette, you will need to swap cassette or freehub body.
What Amazon Reviewers Are Saying
At time of writing, the LOYALHEARTDY 72V 2000W conversion kit has a perfect score on amazon of five stars, based upon only one review from Cassandra Dib. She awarded five stars to the kit and emphasized its ease of build and fit.
She said: “the kit was very easy to setup and the motor fit perfectly. I still need to get a battery but the top speed is going to be around 40-50 mph. The brakes are very high quality and slip right into the handlebars. If an eleven-year-old kid can build this, then so can you.”
Seven other buyers have found her review helpful.
Her review paints a picture that is consistent with spec sheet listings for this particular item. The top speed listing of approximately 40-50 m.p.h. Should match well what would be expected from a 2000-watt gearless hub motor running off a 72v supply line.
find out more about the LOYALHEARTDY conversion kit on amazon here.
Because there is only one review available, rating tells us nothing about long-term durability of parts used in this kit. Reliability of the Controller unit over time. Or bearing life expectancy inside the hub motor.
Consider the lack of negative reviews as evidence of limited sales volume rather than a guarantee of perfection.
Who Is This Kit For?
Builders wanting serious performance output from their electric bicycle and already possess a compatible 72v battery source or plan to obtain one will find this kit suitable for their needs. Builders looking for an affordable way to get started with high-power conversion kits while avoiding the higher costs associated with purchasing pre-assembled kits will find this kit appealing.
Builders currently own a 20-inch wheeled bike that uses a 9-speed drivetrain and possesses rigid or steel forks will find this kit easy to install onto their existing bike.
Folding bikes. Custom mini-bikes. Small-wheel mountain bikes and urban bikes are core user groups for this kit.
Small wheel size allows builders to achieve high speeds from compact frames.
Read through electric bike report, for general guidelines on converting your bike to an electric bicycle including important safety standards that apply to any high-powered build.
If you prefer a plug-and-complete conversion, this is not it. You must purchase a separate 72v battery source. You may need to upgrade brakes depending upon how quickly you intend to ride down hills. And you must possess basic maintenance skills for your bike.
Although a child could build this does not mean a child should be handling lithium batteries. Proper checks must be made regarding safe wiring practices, battery management systems (bms) ratings etc.
To see other options for conversion kits that may better suit your frame style visit /ebike-conversion-kits/. For more information regarding building guides, battery selection tips etc. Visit /blog/.
Frequently Asked Questions
Answers to what builders ask before committing to a 72V build.
Does the LOYALHEARTDY 72V kit include a battery?
No, the kit does not include a battery source. However, it includes almost everything else you'll need to convert your bike into an electric bicycle including the rear hub motor with wheel. Controller in a bag. LCD display with speed reading ability. Mileage counter functionality and error codes display capability. PAS sensor and Throttle capability (adds manual control over maximum speed). Cruise control capability (sets motor speed to constant value). And brake levers with integrated power-off functions (motor stops immediately upon braking). Brake levers include power off sensors which immediately shut off the motor once braking action takes place. A separate 72 volt battery pack must be purchased.
Whattop Speed Can I Expect From this Kit?
From Cassandra Dib's review: approximately 40-50 mph top speed based on her experience testing the kit prior to adding a battery pack. Actual speed may vary depending on many factors including:
- voltage level of the battery under load.
- discharge rating of the battery pack.
- rider weight.
- tire pressure.
- terrain characteristics.
- aerodynamic drag characteristics. A 2000 watt gearless hub motor running off a 72 volt supply line is certainly capable of producing top speeds within this range when combined with a suitable battery source.
Does the Kit Work with 9-speed Bikes Only?
The kit contains a 9 speed freehub flywheel body specifically engineered for use with a 9 speed freehub assembly. If your bike is equipped with an 11 speed or 12 speed drivetrain, you will need to replace either the cassette or freehub body. You will need to determine whether your existing freehub assembly will be compatible with this conversion kit before making a purchase decision.
Whattype Of Brakes Do I Need for this Build?
The kit includes power off brake levers which shut off the motor when activated by squeezing them. However, given the amount of energy being generated by this electric bicycle build (approximately 2 kw peak output), standard mechanical disc brake assemblies may not be able to provide enough stopping force at speeds above approximately 30 mph to safely stop the bike without causing damage or injury. It would be wise to upgrade to hydraulic disc brakes for high performance builds such as this one that produce high levels of kinetic energy during deceleration. Additionally, upgrading your brake pads to compound-type pads designed for high heat dissipation may help prevent overheating issues due to excessive friction caused by rapid braking action.
Cani Use Cruise Control with this Kit?
Yes, the kit includes cruise control functionality controlled via an LCD display located on the handlebars. Pressing the cruise control button sets your desired speed and maintains that speed even while pedaling until you intentionally deactivates it by pressing either of the brake levers. This feature provides benefits for riders who intend to ride at steady state speeds for prolonged intervals as it allows them to relax their grip on the Throttle bar and reduce fatigue associated with maintaining continuous acceleration over time