Not quite as warm here and we were in the rain.
May be true about patches being better now but there were allways 2 kinds. The ones with feathered edges stick the best and I have allways used those on cars and motorcycles. The bicycle style, punched out of a sheet type patches I will use on a bicycle or ped. Like every other repair, cleanining and prep is 90% of a successful job. On tubes, it is also important that the tube not be twisted or folded inside the tire. It is easy for this to happen with an older, sticky tube. Talcum powder works wonders if you have some handy.
Btw, several turns of duct tape make an excellent rim tape to protect the tube from spoke ends.
Speaking of flats again, on the way to the BBQ, I got a rear tire flat. It was a pinhole on the rim side of the tube, near, but not at the spokes and about 8 inches from the valve stem. When I fixed it, I could find no reason for the hole. A couple of weeks ago, I got a flat in the same tube. It was a similar little pin hole in about the same position on the tube except in the opposite direction from the valve stem.
I did not remove the wheel to fix the first flat so I know the tube was not turned around. For the second repair, I removed the wheel and cleaned the rim with a brass wire brush. I also cleand some debris out of the tire and brushed the flakes of rust off the bead. I am assuming that there was something floating around between the rim and tube which caused these punctures. Possibly a flake of chrome plating although I am not sure.
Anyway, the patch I had installed on the road was slightly loose on one edge, but the area over the hole was fine. Probably a result of a greasy fingerprint while fighting with the chains by the side of the road. After cleaning everything up, I patched the new hole, talc'd the tube and it has held air so far.
My question is, does anyone have any idea what may have caused these punctures? I am used to the reason for a puncture being obvious but these spontaneous flats have me baffled.
I should confess that the tire and tube are both 1979 original equipment, but this is normal for me anf I have not seen this kind of problem before.
I am also fairly sure that "clean living", or the lack of it, is not a significant factor.