I really like this one

on purpose it has ultra low gearing 25 up to about 6 to 7 miles per hour and than it shifts into second gear automatically which is still very low with about 35
great for toodling around or pull a trailer with waterjugs, gasoline or groceries ( Im thinking for the boat when you at anchor and need to haul the bike in a dinghy to shore and get water etc etc )

probably a little slow for you, though