E-BikeKit Rear Wheel Conversion System – No Battery

• Complete SINET™ rear-wheel conversion system for riders who already have a compatible 48V battery
• 500W nominal rear hub motor system with smooth sine-wave motor control
• External SINET™ controller for flexible mounting and battery integration
• Choose cadence or bottom bracket torque-sensing pedal assist
• 3.5" full-color SINET™ LCD with USB charging port, diagnostics, and programming
• USA hand-built rear motor wheel configured for your wheel size, dropout spacing, brake setup, and freewheel
• Thumb throttle and locking e-brake levers included
• Battery and charger are not included

The E-BikeKit Rear Wheel Conversion System – No Battery is designed for riders who already have a suitable 48V battery or need a replacement conversion system without purchasing another battery.

Built around the latest SINET™ electronics, the system combines quiet sine-wave motor control, refined throttle response, your choice of cadence or torque-sensing pedal assist, and an intuitive full-color display.

Rear-Wheel Electric Bike Conversion System – No Battery

This version uses an external SINET™ sine-wave controller, giving you flexibility in battery choice, battery location, controller mounting, and wiring layout. It is well suited for new conversions, replacement systems, adult tricycles, cargo bikes, recumbents, and specialty applications where a compatible battery is already available.

Rear-wheel configuration: Use the selections on this page to configure the motor wheel and pedal-assist system for your application:

• Wheel size
• Rear dropout spacing
• Disc-brake or non-disc configuration
• Freewheel
• Cadence or bottom bracket torque-sensing pedal assist

Rear wheels are USA hand-built using 12-gauge stainless steel spokes and double-wall aluminum rims. Correct measurements and selections are important. If you are unsure about fitment or battery compatibility, contact us before ordering.

Who is this system for? Riders who already own a compatible 48V battery and want a high-quality rear-wheel conversion or replacement system without purchasing another battery and charger.

• USA hand-built rear hub motor wheel configured to your selections
• External SINET™ sine-wave controller
• SINET™ 3.5" full-color LCD with USB charging port
• SINET™ component wiring harness
• Thumb throttle
• Left and right mechanical e-brake levers with motor cutoff and parking lock
• Motor cable
• Selected freewheel
• Battery wire harness / pigtail for connecting a compatible 48V battery
• Torque arm(s), washers, zip ties, and installation hardware as required

Your pedal-assist selection determines the sensor included:

• Cadence Sensor: Left-side external cadence sensor with 12-magnet split disc
• Bottom Bracket Torque Sensor: 68 mm square-taper torque-sensing bottom bracket with required SINET™ extension cable

Not Included: Battery, charger, and battery mounting system.

Display Mounting Note: A handlebar extender is not included with this universal system. Most standard bicycles can mount the LCD directly to the handlebars. Some bicycles and many adult tricycles may require a separate display mounting extension because of baskets, handlebar shape, or steering geometry.

The external-controller version of SINET™ is designed for riders and builders who want flexibility in battery choice, mounting location, controller placement, wiring layout, and future service.

• Quiet, efficient SINET™ sine-wave motor control
• External controller for flexible mounting
• 3.5" full-color LCD with USB charging port
• Matched waterproof electrical connectors throughout the SINET™ system
• Cadence and torque-sensing pedal-assist compatibility
• Throttle-on-demand
• Motor cutoff through both e-brake levers
• Easy controller access for diagnostics or future replacement

Rear-wheel conversions require a few measurements and drivetrain choices before ordering. Use the selections on this page to configure the wheel for your bike.

• Wheel Size: Select the wheel diameter that matches your bicycle or tricycle.
• Dropout Spacing: Select the rear spacing that matches your frame, brake, and drivetrain configuration.
• Disc Brake: Choose Yes or No based on whether your rear wheel uses a disc brake.
• Freewheel: Select the freewheel that matches your drivetrain.

Measure before ordering. Rear dropout spacing, brake configuration, and freewheel selection affect wheel fitment. If you're unsure what to select, contact E-BikeKit before ordering and we'll help identify the correct configuration.

Cadence Sensor

The cadence sensor detects crank rotation and activates pedal assistance according to the assist level selected on the LCD. It is an external left-side sensor and is the simpler installation option for most conversions.

• Left-side external sensor
• 12-magnet split disc
• Detects crank rotation
• Simple installation on compatible bikes and trikes
• Does not measure rider force

Bottom Bracket Torque Sensor

The optional bottom bracket torque sensor measures rider effort and provides motor assistance in proportion to how hard you pedal, creating a smoother and more natural riding feel.

• 68 mm square-taper bottom bracket
• Required SINET™ extension cable included
• Measures rider pedaling force
• Provides smooth, proportional assistance
• Requires compatible 68 mm square-taper bottom bracket fitment
• Installation requires a protected cable-routing hole through the bottom bracket shell

Which should you choose? Cadence sensing is simpler to install and provides dependable traditional pedal assist. Torque sensing provides the more natural and responsive riding experience but requires compatible bottom bracket fitment and a more involved installation.

The included SINET™ 3.5" full-color LCD provides clear ride information along with system setup, diagnostics, and programming controls.

• 3.5" full-color display
• USB charging port
• Battery voltage display
• Battery level indicator
• Current speed
• Trip meter and odometer
• Pedal-assist level selection
• Walk-assist mode
• Error diagnostics
• Advanced programming menu

Watch the video below for an overview of the SINET™ LCD, including initial setup, programming, display operation, and commonly used system settings.

Watch the SINET™ LCD Programming Guide on YouTube

Download the SINET™ LCD quick-start guide for display operation, setup, programming, and system settings.

Download the SINET™ LCD Quick-Start Guide (PDF)

• System Type: Rear-wheel electric bike conversion system
• Nominal Motor Power: 500W
• System Voltage: 48V
• Motor Type: Brushless internally geared rear hub motor
• Rear Dropout Spacing: Selectable based on application
• Controller: External SINET™ sine-wave controller
• Battery: Not included
• Charger: Not included
• Display: SINET™ 3.5" full-color LCD with USB charging port
• Throttle: Thumb throttle included
• Pedal Assist: Cadence sensor or 68 mm bottom bracket torque sensor
• Brake Compatibility: Disc-brake or non-disc rear configuration depending on selection
• Drivetrain Compatibility: Select the appropriate freewheel for your drivetrain
• Wheel Build: USA hand-built
• Spokes: 12-gauge stainless steel
• Rim: Double-wall aluminum
• Recommended Total Load: Up to approximately 300 lb depending on bicycle and application

No battery or charger is included with this system. It is intended for use with a compatible customer-supplied 48V lithium-ion battery.

• Battery Voltage: Compatible 48V battery required
• Battery Connection: Battery wire harness / pigtail included for integration with a compatible battery connection
• Battery Mounting: You must provide a secure and structurally appropriate battery mounting solution
• Discharge Capability: The battery must safely support the current demand of the SINET™ controller
• Battery Condition: The battery must be in safe operating condition with a functioning battery management system
• Polarity: Correct polarity must be verified before connecting the battery

Important: A battery being 48V does not by itself guarantee compatibility. Connector type, polarity, discharge capability, battery condition, and mounting must all be appropriate for the system.

If you are unsure whether your existing battery is compatible, contact E-BikeKit before ordering. Photos of the battery label, battery connector, and mounting arrangement can help us evaluate compatibility.

This rear-wheel conversion system is designed for compatible bicycles, adult tricycles, cargo bikes, recumbents, and specialty cycles with conventional slotted rear dropouts.

Before ordering, confirm:

• Correct rear wheel size
• Correct rear dropout spacing
• Disc-brake or non-disc rear configuration
• Correct freewheel for your drivetrain
• A secure mounting location for the external SINET™ controller
• A compatible 48V battery and secure battery mounting solution
• Bottom bracket compatibility if selecting the torque sensor

Not Compatible With:

• Rear thru-axle frames
• Weak, damaged, or unsuitable rear dropouts
• Rear frames with spacing that does not match the selected wheel configuration
• Brake setups that do not match the selected disc-brake or non-disc configuration
• Drivetrains that do not match the selected freewheel
• Incompatible, damaged, or under-rated batteries
• Bottom brackets incompatible with the selected pedal-assist system

If you're unsure about fitment, contact E-BikeKit before ordering. Photos of your rear dropouts, drivetrain, brakes, battery, battery connector, bottom bracket area, and intended controller location can help us confirm the correct configuration.

Installing a rear-wheel electric conversion system requires mechanical bicycle work as well as mounting and connecting electrical components. Professional bicycle-shop installation is recommended if you are not experienced with bicycle wheels, brakes, drivetrains, battery wiring, and electric conversion systems.

• Confirm that the selected motor wheel matches the frame's rear dropout spacing
• Install and adjust the selected freewheel
• Confirm disc-brake or non-disc brake compatibility
• Install the motor wheel into the rear dropouts
• Install the supplied torque arm(s) as required and properly tighten axle hardware
• Mount the external SINET™ controller securely
• Install the compatible 48V battery using an appropriate mounting system
• Verify battery voltage, polarity, connector compatibility, and discharge capability before connection
• Install the LCD, thumb throttle, locking e-brake levers, and selected pedal-assist sensor
• Route wiring away from moving parts, heat sources, steering components, tires, chains, and sharp edges
• Verify brake cutoffs, throttle operation, pedal assist, drivetrain clearance, battery connection, and display settings before riding

Proper wheel fitment, axle security, torque-arm installation, brake adjustment, drivetrain setup, controller mounting, battery mounting, electrical connection, and cable routing are essential for safe and reliable operation.

Learn more: Top 25 Frequently Asked Questions

E-BikeKit technical support is available before and after your purchase to help with product selection, rear-wheel configuration, battery compatibility, installation, setup, and replacement parts.

Questions? Call us toll-free at 1-866-882-3245, Monday–Friday, 9am–5pm EST, or email support@ebikekit.com.

This system ships without a battery, so there is no lithium-battery Hazmat shipment associated with this product. Components ship via standard ground service unless otherwise noted. Depending on the order, components may arrive in more than one package.