|Quite the wheel. Those aren't spokes but the guides and engine for turning the rim.|
|That's a hefty battery.|
|Andrew bought an inexpensive bike just for the purpose of adding the electric wheel.|
One thing about this and other e-bikes that worry me - are the brakes sufficient to stop the bike at pedaling plus electric assist? The other issue is whether these should be allowed on bike paths. It's clear that mopeds are allowed on bike lanes but I'm not sure if this meets the criteria for keeping off bike paths. I am generally concerned about overpowered bikes on bike paths with kids around. This concerns includes bikes with the Copenhagen wheel and also racers (or pathletes) that keep me from taking my nine year old on the Minuteman. Another concern about the wheel is that the fork you use is up to you. I'm pretty sure that I wouldn't want to try this with a carbon fork and I would feel safest on a steel fork that was made for the purpose (although that means losing suspension). Your mileage may vary.