I got a nice comment on my Rudge, asking for more information. I thought I would copy my reply here, because maybe someone else is intrigued.
"No derailleur, it uses a Sturmey-Archer AW 3-speed hub, and the frame is designed for a Sturmey-Archer. With the 48/17 sprocket pair, its gearing is 103, 77, 58 gear inches with 27x1 ¼ tires. The tires are Specialized Road Sport, 32 mm wide with wire beads. The rims are the original steel Dunlop Special Lightweight, in really good condition. I've also seen some Paselas with tan sidewalls that look like the original gumwalls.
I scored a 40 hole Super Champion model 58 aluminum rim for the back, which is the harder size to match. The front is 32 holes, which should not be as difficult. I also have a four speed hub for it, an FG with integral generator. The ratios are the same as for the AW, except I think the low gear is about 25% lower, so it should be about 103, 77, 58, 46 gear inches. Not quite what I'd want from a modern compact setup, but pretty decent.
There is some rust on the frame. I've cleaned the chain , but I still need to take it all apart and clean parts. Then I have to de-rust the frame and see about patching the paint."