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This is a complete electric conversion kit built specifically for the Sun EZ-3 USX HD delta trike. It pairs a hand-built 20-inch front motor wheel with a 48V 15Ah battery, an integrated SINET controller and a 3.5-inch color LCD with USB charging. You choose cadence sensing or bottom-bracket torque sensing, and a throttle comes with either. It is aimed at heavy-duty riders: the kit is rated for total loads up to about 600 lb, and the model-specific battery plate, torque arms and hardware mean less fabrication than a generic kit. The trade-off is that it only fits this one trike, and the front-wheel drive changes steering feel under power compared with rear-drive conversions.
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Lowest price we've seen: $1,442.00 on Nov 15 at EBikeKit.com. Tracked across 1 store since Nov 15.
This conversion kit is made for the Sun EZ-3 USX HD delta trike and turns it into an electric trike. It is built around a USA hand-built 20-inch front motor wheel with a brushless, internally geared hub motor. The SINET system matches the controller, display, pedal-assist input, throttle, brake cutoffs, motor connection and battery interface.
The controller is built into the battery cradle, which mounts to the trike with the EZ-3 HD battery mounting plate. A 3.5-inch color LCD shows system and ride information and has a USB charging port. The Topeak Bar Extender holds the LCD on the handlebar. Both locking e-brake levers cut motor power, and a thumb throttle works with either pedal-assist option.
You choose between two pedal-assist systems. The cadence sensor starts motor assistance when it detects crank rotation. The bottom bracket torque sensor measures rider effort and gives smoother, proportional assistance. The kit is designed for total loads up to approximately 600 lb, with an estimated range of approximately 15 to 45 miles depending on conditions.