Interesting... that one has the same front derailleur problem as mine....

It doesn't fit!

The mounting post is incorrectly placed for the derailleur to work properly.
Hence, it's a 7 speed. Or manually shifted for 21 speeds.

Of course it doesn't NEED too many speeds, as speed is not it's forte. (rear wheel steering is tricky!)

(I have to hide the auction from the Mrs., as I got mine as a gift and seeing the auction at $860 with a day left, she might try to persuade me to part with mine)