I love my hybrid Rebike 707 semi-bent. I put a 16" Crystalyte front hub motor on the front wheel, with a 48 volt nicad pack and a good 35 amp controller, and some torque arms for safety -it cruises at just under 25 miles per hour on the flat with no pedalling. With pedalling I can get it up to about 28 mph, fast enough to blow most lycras away. It's heavy yet lively with "real steel goodness". And I'm good for about 40 miles.