Here's my latest conversion and a peek at my next one.
Purchased this Biria EZ-Boarder in 2024. Took me a year to get around to it, but spoked up an AKM128 hubmotor for the rear wheel. It has an 800W sticker, which I'll have to replace to be legal in Illinois, but I did use a 20A 48V KT controller. We ride it at 12 mph,
Intent was a bike we can get on/off without getting a hernia, The seat is pointed to the sky because my wife likes it that way,
The motor is officially advertised at 6.2 lbs, so 1 1lb for the freewheel and 1 1/2 pounds for the alloy rim/spokes seems right. Add 6 pounds for electronics/battery. Bike is probably pushing 50 lbs,
Technology now allows tiny batteries like these, Top is 150WH, while bottom is 230WH and both can flow 20 amps if needed. At 8 WH/mile, one is good enough for an evening ride. I can carry a spare in the handlebar bag,
Nothing fancy, Five level PAS and throttle.
Biria sells a front drive model like this for $1995. I could have gotten a used Biria donor for $200-300, but I bought it new for $699. Put about $400-500 into the electricals.