Hi
I am doing this because i recently bought a run down bike which I had wanted to make it my commutering bike. On closer inspection, it got dry rotted tires and a bad rim too. The rim was a 23 and it wont be practical to have a pillion on it. The most the rim can take is a 28c which is still too small.
I decided to run 26" on it because I was always curious on whether that can be done. This for the advice! you guys are a very knowledgable lot.