FB thanks. I appreciate being baffled together. I have carefully flexed the tire, looked for cosmetic damages on the outside. Measured the locations of the pin leaks. All different. All leaks perpendicular to the rim.. Facing in the direction to the road. ( Side punctures might indicate problems in packing the tube.But, I have none. ) My club is frustrated with the way I change flats, so I tell them to go on ahead. .. I change flats slowly and Methodologically , looking for why it happened.
Flats are no big deal , but I hate to throw out a tire before its time. It must be a shard of glass that only rears its head under 100 pounds of pressure or I over estimate the depth of the casing. Some roads I ride on are pretty much strewn with debris.
How much miles does one expect to put on your tires before you throw it away. ?