Some of you have been looking at commercial electric bikes. Here is what I think is a nice commercial ready-made electric bike.

http://cgi.ebay.com/FORD-TH-NK-BIKEF...item5639ae296b

Notice, the tires are regular bicycle tires so they can be replaced by off-the shelf tires. What I like about this bike is that it has a place for a battery. Notice the battery can be pulled off the bike and probably locked down on the bike too (not sure about that, though). This bike isn't perfect because it'd be nice if there was a little bigger area for the battery compartment but someone skilled with fiberglass or plastic could make his own battery container and slide some LIPO batteries in there and make a nice bike. Slide some LIPO down in there and then change the hub motor and you got a really fast electric bike. I'd only buy a commercial electric bike for the frame because none of them would be fast enough for me. This one isn't perfect but it's close. You could probably take the battery out, cut a hole in it, take out the SLA's and put LIPO in it.

I think the eGO cycle is perfect for a commercial bike. Look at all the room below where you could store some lithium battery and the hubs could easily be changed out for a faster one. Unfortunately, I think it's hard to find a cheap used one. I'm not a welder so I like to look around and find bikes that are already built for batteries.