Dave,
I've been using the "Bike Electrified" 400W brushless hub motor kit from
Wilderness Energy for a few years now. I bought it specifically to climb a
hill in the middle of my ride. It won't climb on batteries alone, but now
I can make at least 2 trips up with a 30 pound passenger! Without the
assist I could barely make it up solo and needed a short break at the top.
I've never gone more than 12 miles on a charge, so the ultimate range is
unknown. I've had the front wheel slip a bit while climbing in loose
gravel. Leaning forward helps... I'm also careful not to hit curbs and
possibly dent the front rim.
It's also great for riding in a headwind. You can maintain speed without
burning out the legs :) If I was doing a 2nd bike, I'd probably use a 600W
to 1000W motor. Bicycle conversions are also relatively inexpensive for
conversion to Lithium.
http://www.evalbum.com/777-Adrian
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