36V/48V 500W Electric Bike Conversion Kit - Brushless Geared Hub Motor (Front / Rear Freewheel / Cassette) with Double-Wall Rim & 26A Controller

Convert your favorite bicycle into an efficient, high-torque electric ride with the 36V/48V 500W Brushless Geared Electric Bike Conversion Kit. Engineered with internal planetary reduction gearing, this motor delivers energetic acceleration, brisk cruising speeds up to 30–32 km/h (19–20 mph), and up to 64.5 N·m of torque—making it the ideal solution for steep city hills, everyday commutes, and long weekend tours without battery drag.

Whether your bike features a traditional screw-on freewheel, a modern multi-speed cassette freehub, or you prefer a front-wheel drive setup, this kit has you covered. Built into a sturdy double-wall aluminum rim with heavy 12G spokes and paired with a responsive 26A 9-MOSFET controller and digital display, you get smooth power delivery and durable reliability every time you ride.

Product Overview & Installation Video

36V 48V 500W Brushless Geared Hub Motor Specifications and Planetary Gear Structure

Key Highlights & Benefits

High-Torque Planetary Geared Motor: Features durable internal planetary reduction gears that produce 60–64.5 N·m of climbing torque while remaining lightweight and compact, completely eliminating magnetic resistance when pedaling without power.
Dual Voltage Performance (36V or 48V): Compatible with both 36V and 48V battery systems for speeds up to 30–32 km/h (19–20 mph) and consistent power output across varied terrain.
Three Drive Configurations: Available in Front Wheel (100mm fork dropout), Rear Freewheel (135–142mm dropout), and Rear Cassette (≥142mm dropout) to match your bike's exact drivetrain setup.
Double-Wall Reinforced Rim: Built with high-strength double-wall aluminum alloy and 36 heavy-gauge 12G steel spokes to withstand potholes, city curbs, and trail impacts.
Dual Brake Compatibility: Engineered to fit both traditional rim V-brakes and modern 6-bolt disc brake rotors seamlessly.
Intelligent 26A 9-MOSFET Controller: Smooth power delivery with built-in multi-voltage detection (24V/36V/48V), self-learning forward/reverse rotation, low-voltage battery protection, and safety brake power cutoff.
Custom Display Options: Choose between the multi-data S900 LCD meter, vivid high-contrast S966 color screen with handlebar remote, compact M5 display, or motor-only option.

Double Wall Rim Sizes 20 to 29 Inch 700C and Fork Dropout Spacing

Drive Type & Fork Dropout Guide

To ensure a perfect fit on your bicycle, check your fork or frame dropouts before choosing your kit:

Front Wheel Drive: Fits standard 100 mm front fork dropouts with 10mm axle slots. Quickest to install without touching your rear gear cassette.
Rear Wheel (Rotate Freewheel): Fits standard 135 mm to 142 mm rear dropouts. Accepts threaded screw-on freewheels (6, 7, or 8-speed).
Rear Wheel (Cassette Freehub): Fits ≥ 142 mm rear dropouts. Features an integrated splined freehub body designed for push-on cassette gear sprockets (8, 9, 10, or 11-speed).
Universal Wheel Sizing: Available in 20", 24", 26", 27.5", 28", 29", and 700C diameters (28", 29", and 700C share the identical ISO 622 bead seat diameter).

26A 9-MOSFET Intelligent Motor Controller Wiring Diagram

Controller Plug Connection Pinouts and Connectors

Intelligent 26A Motor Controller

The heart of the electric system is a heavy-duty 9-MOSFET controller rated for 26A peak current and 13A continuous current. Designed with dedicated SM plugs and an XT60 battery connector, each wire is clearly marked for simple, foolproof assembly:

Motor Phase & Hall Sensors: Delivers precise brushless motor synchronization and high starting torque.
Safety Electronic Brakes: Cuts motor power instantly when either brake lever is squeezed.
Pedal Assist Sensor (PAS): Smooth 1:1 cadence sensor assists your natural pedaling rhythm.
Thumb Throttle & Headlight Output: Dedicated connections for ergonomic thumb control and optional 2-pin front lighting.
Self-Study Function: 2-pin white wires allow automatic motor phase learning and reverse rotation correction with a simple connection.

LCD S900 Digital Display Multi-Function Meter

S966 Color Screen Smart Display with External Keypad

500W Electric Bike Motor and Controller Wiring Schematic

Technical Specifications

Parameter	Specification
Rated Voltage	DC 36V or 48V (Controller auto-supports 24V/36V/48V)
Rated Power	500 Watts continuous
Motor Construction	Brushless Geared Hub Motor (Internal planetary reduction gears)
Rated Speed	30 – 32 km/h (approx. 19 – 20 mph)
Rated Motor RPM	265 – 325 RPM
Torque Output	60 – 64.5 N·m
Rim Construction	Double-Wall Aluminum Alloy Rim with 12G 36H Heavy Spokes
Available Wheel Sizes	20", 24", 26", 27.5", 28", 29", 700C
Fork Dropout Width	Front: 100 mm \| Rear Freewheel: 135–142 mm \| Rear Cassette: ≥142 mm
Brake Compatibility	V-Brake & Standard 6-bolt Disc Brake (Universal)
Controller Model	26A Maximum Current, 9-MOSFET (Size: 124×62×38 mm, Weight: 348g)
Battery Connector	Standard High-Current XT60 Male Plug
Display Options	S900 LCD, S966 Color Display, M5 LCD, or Motor Only
Pedal Assist	1:1 Cadence PAS Sensor included

Package Contents Checklist

✔ 1× 36V/48V 500W Hub Motor Wheel: Pre-laced to double-wall alloy rim (Front, Rear Freewheel, or Rear Cassette as selected).
✔ 1× 26A 9-MOSFET Motor Controller: With XT60 battery lead and full SM harness connectors.
✔ 1× Digital Display Unit: (S900, S966 Color, or M5 depending on selected variant).
✔ 1× Smooth Thumb Throttle: Ergonomic handlebar throttle.
✔ 1× 1:1 Pedal Assist Sensor (PAS): Crank-mounted cadence sensor.
✔ 1 Pair Safety E-Brake Levers: Equipped with instant motor power cutoff microswitches.
✔ 1 Pair Brake Sensors: For optional brake integration.
✔ Axle Installation Hardware: Torque washers, retention clips, nuts, and protective caps.

Notice: Battery, tire, and inner tube are not included. Please ensure you pair this kit with a 36V or 48V lithium-ion battery rated for at least 26A peak discharge current.

Frequently Asked Questions (FAQ)

Q: What is the difference between Freewheel and Cassette rear wheels?

A: A Freewheel threads directly onto the hub using internal threads (typically 6 or 7-speed older gear systems). A Cassette slides onto a splined freehub body and is secured with a lockring (common on 8, 9, 10, and 11-speed bikes). Please verify your bicycle's rear gear cluster type before ordering.

Q: What type of battery is recommended for this 500W kit?

A: A 36V or 48V lithium-ion battery with a continuous discharge rate of at least 15A to 20A and a peak rating of 26A or higher is ideal. Ensure your battery uses an XT60 female discharge connector or use a compatible adapter.

Q: Does this geared motor create pedaling drag when the battery is off?

A: No. Geared hub motors contain an internal freewheel clutch. When the motor is turned off or when you pedal faster than the motor speed, the wheel freewheels with zero magnetic drag, feeling just like a standard bicycle.

Q: Can I use both rim brakes (V-brakes) and disc brakes?

A: Yes! The aluminum rim features CNC-machined braking tracks for rim brakes, and the motor hub includes standard 6-bolt mounting threads for 160mm or 180mm disc brake rotors.

Q: Are 28-inch, 29-inch, and 700C rims the same?

A: Yes, all three rim sizes share the universal ISO 622 bead seat diameter. They accommodate 700C road/gravel tires, 28" hybrid/city tires, and 29" mountain bike tires.

Q: What warranty and customer support are provided?

A: E Smart Way backs this conversion kit with a 1-year motor warranty and a 3-month replacement warranty on electronic accessories. All orders include free shipping and complete delivery tracking.

International Shipping & Customs Notice

Free Worldwide Shipping: Every kit is carefully tested and securely boxed before dispatch. A tracking number will be provided as soon as your parcel ships.

Customs & Import Duties: Depending on destination regulations, international shipments may be subject to local VAT, customs clearance fees, or import duties charged by local customs authorities. As standard in cross-border commerce, these fees are the customer's responsibility.

Prompt Delivery: Please ensure your delivery address and phone number are accurate at checkout so local customs or couriers can reach you easily if required.