I was wondering what sizes were likely to work. I had installed the tire on the front rim, and planned to install the lightly worn tire from the front onto the rear. But getting the rear wheel off is more tricky (IGH) so I was wondering what sizes others had put on similar conversions. Fastjake answered that for me.
Anyhoo, I eventually did take the back wheel off and place the front wheel with new tire approximatelyt where it would be mounted in the rear of the bikeand there seems to be clearance for the frame, frnder, and brakes. I will most likely go get another of these tires when I wear out the one I took off the front.