After many attempts at patching an inner tube lately, I decided to put in a new tube for my front wheel. Now that I'm left with a tube that I cannot patch anymore, I was thinking of the idea of putting this old uninflated tube into the tire before putting the new tube in. By having both tubes in the tire, the old tube would provide an additional 2 layers of inner tube material for a sharp object to have to penetrate before causing a flat. Of course, I would have to cut the stem off the old uninflated tube in order for it to fit. But I don't know if both tubes would fit inside the tire and allow the tire to be reinstalled on the wheel. I didn't try it because I didn't think of it until after I put the new tube in and mounted everything and put it back on the bike.

Has anyone else tried this idea yet?