John in CR
100 TW
mark swenson said:A crystalyte 408 motor, 20" rim with a 36 volt battery would work out really well with a 35 amp controller. Depending on how far you want to commute (with what you describe, it looks like 10 miles, max) I would say a $400 Li-Po battery would be more than enough for the power supply ($550 for a higher power system), it looks like your frames are running about 400-500 and the motor would be about 350-450. I am sure, in volume, the prices would be cheaper. This would give you a bike that I would buy and would not immediately regret the purchase (as I would with a Walmart-type e-Bike) for about $1200.
Mark,
On the cost side your numbers look about 2x high and the frame more like 3x, though some ancillary costs will add back some. There's absolutely no reason that someone can't produce a solid quality ebike and sell it profitably at well under $1k. You seem to have lost sight that it's just a bicycle + small electric motor + batteries + relatively minor electronics. Hand craftsmanship or very long range Lipos is the only reason to pay more. China puts what, almost 20 million electric 2 wheelers on the road each year. Probably only the large electric scooter/motorcycles cost over $1k, and with that kind of volume it's doubtful to be all junk...too much competition. They send the junk overseas instead.
John