Originally Posted by
ClydeClydeson
You might find a wheel already built with a 20" rim and IGH/cassette hub, but I kind of doubt it. If you want something less common then you usually have to build it (or have it built) yourself. However, building a wheel with new rim, spokes and hub is not really all that big of a job, even though it is a skill that has been eclipsed by factory-build low-spoke count wheels.
I do just about any kind of repair or maintenance a bicycle could ever need but wheel building intimidates me. I laced a 4x wheel in my teens (I'm in my 60's) but had to take it to the shop to get trued. I have Jobst Brandt's book. I have a Minoura truing stand. What more do I need? Thank you for reminding me that this is still yet another option.