Originally Posted by
fuzz2050
I suppose some more rubber between your tube and the ground can't hurt, but I don't think it would do you much good. The extra thickness of an inner tube just isn't that much considering. I've heard tell of people using tires as tire liners (I think there is a thread in commuting).
Using a 2 tire approach, you get twice the flat protection, and half the lively, quick tire feel.
Yes. Back when mountain bikes were a New Thing, we made our own studded tires for riding on snow and ice by screwing sheet metal screws through the tread from the inside. Then we'd cut the beads off an old tire and insert it between the studded tire and the tube to protect the tube from all those metal screw heads. It worked well enough to allow riding on snow and ice, but on dry pavement the additional weight was not helpful.
For puncture resistance, modern tire liners and/or self-sealing tubes are a superior solution IMHO.