Kit - Eco-Tad

This Eco-Tad–specific E-BikeKit conversion system is designed to convert the Sunseeker Eco-Tad SX tadpole trike into a clean, efficient, and responsive electric trike.

The system includes a USA hand-built 20″ rear motor wheel with an installed 7-speed freewheel, integrated SINET™ controller, 3.5″ color SINET™ LCD, 48V 15Ah lithium-ion battery, and 3A charger.

• Configuration developed specifically for the Sunseeker Eco-Tad SX
• Integrated controller housed in the battery cradle
• Installed 7-speed freewheel included
• Choice of cadence pedal assist or bottom bracket torque sensing
• Throttle-on-demand included with either pedal-assist option
• Estimated range of approximately 15–45 miles depending on conditions
• Recommended for total loads up to approximately 300 lb

Choose your pedal-assist system:

• Cadence Sensor: Activates motor assistance when crank rotation is detected.
• Bottom Bracket Torque Sensor: Measures rider effort and provides a more natural, proportional level of motor assistance.

The pedal-assist type is the only selection required. The motor wheel, 7-speed freewheel, integrated controller, battery, charger, and battery mounting system are included with every Eco-Tad conversion system.

Who’s it for? Riders and dealers looking for a complete, model-specific Eco-Tad conversion system with matched components, a professionally built motor wheel, and direct technical support.

This system includes the battery, charger, integrated controller, motor wheel, and installed 7-speed freewheel. The only selection required is the pedal-assist type: cadence or bottom bracket torque sensing.

Eco-Tad Conversion System Components:

• USA hand-built 20″ rear motor wheel with rim strip and installed 7-speed freewheel
• Integrated SINET™ controller housed in the battery cradle
• 3.5″ color SINET™ LCD with USB-C port
• Thumb throttle
• Left and right locking e-brake levers
• Main SINET™ wiring harness
• Motor cable
• Topeak handlebar extender
• Torque arm
• Installation hardware
• 48V 15Ah lithium-ion battery
• 3A battery charger
• Integrated-controller battery cradle and mounting hardware

Pedal-Assist Selection:

• Cadence Sensor: Split-disc cadence sensor and pickup sensor
• Bottom Bracket Torque Sensor: 68 mm square-taper bottom bracket torque sensor with the required extension cable

The motor wheel is supplied with a rim strip and installed 7-speed freewheel. Tire and tube are not included.

The SINET™ system combines the controller, display, pedal-assist input, throttle, brake cutoffs, motor connection, and battery interface into one matched electrical platform.

• Integrated controller housed within the battery cradle
• 3.5″ color LCD with clear system and ride information
• USB-C charging port built into the LCD
• Matched waterproof electrical connectors
• Cadence and torque-sensing pedal-assist compatibility
• Throttle-on-demand operation
• Motor cutoff through both e-brake levers

Watch the video below for an overview of the SINET™ LCD, including initial setup, programming, 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)

Motor Wheel

• Wheel Position: Rear
• Wheel Size: 20″
• Construction: USA hand-built motor wheel
• Brake Compatibility: Disc-brake compatible
• Rear Dropout Requirement: 135 mm
• Freewheel: Installed 7-speed freewheel included
• Rim Strip: Included
• Tire and Tube: Not included

Electrical System

• System Voltage: 48V
• Controller: Integrated SINET™ controller
• Controller Location: Battery cradle
• Display: 3.5″ color SINET™ LCD
• Display Port: USB-C
• Throttle: Thumb throttle
• Brake Cutoffs: Left and right locking e-brake levers
• Total Recommended Load: Approximately 300 lb, including trike, rider, and cargo

Pedal Assist

• Cadence Option: Split-disc cadence sensor
• Torque Option: 68 mm square-taper bottom bracket torque sensor with extension cable

Every Eco-Tad conversion system includes the 48V 15Ah lithium-ion battery, integrated-controller battery cradle, mounting hardware, and 3A charger.

• Nominal Voltage: 48V
• Capacity: 15Ah
• Energy: Approximately 720Wh
• Estimated Range: Approximately 15–45 miles
• Charger: 3A charger included
• Approximate Charge Time: 5 hours
• Maximum Charge Voltage: 54.6V
• Cell Structure: 18650, 13S4P
• Estimated Cycle Life: Approximately 500–800 cycles
• Battery Weight: Approximately 10.1 lb
• Certifications: UN38.3, MSDS, and UL-listed cells

Actual range varies based on rider weight, terrain, speed, temperature, tire pressure, pedal input, and assist level.

This conversion system is designed specifically for the Sunseeker Eco-Tad SX tadpole recumbent trike.

• Designed for a 20″ rear motor wheel
• Requires approximately 135 mm rear dropout spacing
• Compatible with the Eco-Tad SX disc-brake configuration
• Includes an installed 7-speed freewheel
• Recommended for total loads up to approximately 300 lb, including trike, rider, and cargo

The bottom bracket torque sensor is designed for a 68 mm square-taper bottom bracket. Confirm bottom bracket compatibility before ordering the torque-sensor version.

Trikes that have been modified or differ from the standard factory configuration may require additional parts or installation adjustments.

The Eco-Tad conversion system uses matched SINET™ components and connectors to simplify installation on a compatible stock Eco-Tad SX.

• Install the motor wheel, with its installed 7-speed freewheel, into the 135 mm rear dropouts
• Install the supplied torque arm
• Mount the battery cradle securely to the trike
• Install the LCD, throttle, and locking e-brake levers
• Install the selected cadence or bottom bracket torque sensor
• Route and secure the SINET™ wiring harness and motor cable
• Verify axle-nut torque, brake operation, shifting, and cable clearance

Proper torque-arm installation, axle security, battery mounting, cable routing, drivetrain adjustment, and brake adjustment are essential for safe operation.

Professional bicycle-shop installation is recommended when the installer is not experienced with bicycle drivetrain, brake, wheel, or electrical system installation.

This section provides a reference point to help dealers position, present, and support the Eco-Tad conversion system confidently.

Comparable Complete Trike:

• View the complete Eco-Tad SX electric trike built with this system:
  Eco-Tad SX – ElectricTrike.com
• Use the complete-trike listing to benchmark consumer retail pricing, finished appearance, and configuration expectations.
• Fully assembled trikes delivered to customers typically include approximately $300 in freight shipping, which should be considered when comparing total delivered value.

Dealer Support Commitment:

• Real-time installation support by phone, text, and email
• Direct access to system builders and wheel technicians
• Guidance on sensor placement, cable routing, drivetrain setup, and torque-arm installation
• Custom wheel-building support when required
• Fast assistance with shop-floor technical questions

Our mission: Ensure every dealer delivers a clean, professional, and reliable Eco-Tad conversion experience.