Kit - T3

This T3-specific E-BikeKit conversion system is designed to convert the SunSeeker T3 tadpole recumbent trike into a clean, efficient, and responsive electric trike.

The system includes a USA hand-built 20″ rear motor wheel with an installed 8-speed freewheel, integrated SINET™ controller, 3.5″ color SINET™ LCD, 48V 15Ah lithium-ion battery, 3A charger, and Topeak Bar Extender.

• Configuration developed specifically for the SunSeeker T3
• Integrated controller housed in the battery cradle
• Installed 8-speed freewheel included
• Topeak Bar Extender included for LCD mounting
• 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, 8-speed freewheel, integrated controller, battery, charger, battery mounting system, and Topeak Bar Extender are included with every T3 conversion system.

Who’s it for? Riders and dealers looking for a complete, model-specific T3 conversion system with matched components, a professionally built motor wheel, and direct technical support.

This system includes the battery, charger, integrated controller, motor wheel, installed 8-speed freewheel, and Topeak Bar Extender. The only selection required is the pedal-assist type: cadence or bottom bracket torque sensing.

T3 Conversion System Components:

• USA hand-built 20″ rear motor wheel with rim strip and installed 8-speed freewheel
• Integrated SINET™ controller housed in the battery cradle
• 3.5″ color SINET™ LCD with USB charging port
• Topeak Bar Extender for LCD mounting
• Thumb throttle
• Left and right locking e-brake levers
• Main SINET™ wiring harness
• Motor cable
• 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 8-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 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 8-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
• USB Charging Port: Included
• LCD Mounting: Topeak Bar Extender included
• 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 T3 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 T3 tadpole recumbent trike.

• Designed for a 20″ rear motor wheel
• Requires approximately 135 mm rear dropout spacing
• Compatible with the T3 disc-brake configuration
• Includes an installed 8-speed freewheel
• Includes a Topeak Bar Extender for LCD mounting
• 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 T3 conversion system uses matched SINET™ components and connectors to simplify installation on a compatible stock SunSeeker T3.

• Install the motor wheel, with its installed 8-speed freewheel, into the 135 mm rear dropouts
• Install the supplied torque arm
• Mount the battery cradle securely to the trike
• Install the Topeak Bar Extender and mount the LCD
• Install the 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 T3 conversion system confidently.

Comparable Complete Trike:

• View the complete SunSeeker T3 electric trike built with this system:
  SunSeeker T3 CX – 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 T3 conversion experience.