Originally Posted by
fietsbob
Alternate .. seek out a Sachs Hybrid Rear Hub .. 7 speed Cassette driver on a 3 speed IGH.. and lac a rear wheel around It,
then You can have Both a 21 speed drive train and a single chainring.. Crank.
If I was keeping the bike I might mess with something like this, but the bike is too big for me so it is going down the road when I am done.