I purchased an electric bike conversion kit from an Australian business called Solar Bike. It is absolutely fantastic, I purchased the 350W front hub kit with 36V 10ah LiFePO4 battery for my mountain bike (26" rim). I'm getting a range of about 42km with light pedaling and am moving at an average speed of between 35-40km/hr even uphill. These guys are fantastic, quick to respond to emails and at a really fair price. I think that they've done their homework on all the testing from their responses and website. Check them out at Solar Powered Electric Bikes They deliver to anywhere in the world now so I see.