Yesterday as I was about to top off my tires prior to a group ride, I discovered that the rear tire was totaly flat. I had a spare tube in my wedge, and as I was running late, I decided it would be faster to change the tube and figure out what happened to the original when I returned. I had no problem removing the tire and tube. I felt the inside of the tire before installing the new tube, and did not find any obvious cause for the flat. I installed the new tube and road 26 miles without incident. When I returned home, I checked out the original tube and found a very small leak in the center of the tread area. The tube loooked to be in good shape otherwise, so I patched the leak.
Now for the question. Am I better off putting the old tube back on the tire and the new tube in my wedge, should I leave the new tube in the tire and put the patched tube in the wedge for the next time I flat, or does it make any difference?