I was looking at a Raleigh Superbe, which appealed because of the 3 speed and the 26" wheels. The weight, at 40-ish pounds, according to some posts, is too much for me. however. So...I was hoping to get some advice as to a suitable lightweight (531?) donor frame, while retaining the slack geometry, and 26" wheel size (I am assuming I can swap in some 559s with plumpish tires).

TIA

John