Now this is truly spooky.
Here we were discussiong about flats/punctures & patches and...
This morning during the weekend routine - on topping the air in the tyres saw that the air in the front right tyre had reduced considerably. Down to 20 psi. Knew there was trouble somewhere. Checked the tyre thoroughly. Nothing. Checked valve. All well.
Anyway took it to the nearby tyre shop. A large, modern shop where I went the first & only time with Admiral with a metal piece embedded in one of the tyres almost a year+ ago. They checked visually. Nothing.
And then the tyre was dunked in water and at a point there was a 2mm round aperture and a merry chirp of bubbles around it. There was something metallic deep inside.
Tyre pulled out. And the aperture probed. And this was pulled out from deep within.
For comparision.
Appears the full screw was around for some time with the head outside. Hmmm... no wonder I got some great traction for some days !
And then slowly with the running, the head and some portion of the screw wore off and the empty portion started to leak. Can't they make better quality screws I ask you !
Anyway the offending piece of metal removed and first the outer tread surface which was pitted was filled with some materal and glue and sealed off. I was told by the owner not to go in for a strip filler/sealer but opt for a double patch. Agreed for a change - as he informed that many complaints were received about the strips, which when the treads reduced, were popping out like corks despite all the glue being put in.
Then the inner damaged portion of the tyre was gently ground/roughened with a hand electric grinder and glue spread around the hole. First a small cold patch was fixed and pressed hard with a device that looked like a pizza cutter. Next more glue was spread on the first patch and around it and a much larger patch was fixed and pressed hard again.
Tyre set back on the alloy wheel and checked. No merry, gurgling bubbles.
And I got the wheel studs to be greased well, as the wheel was fixed back
I think a thorough job was done. Time will tell.
Paid Rs 170 for the job and 20 bucks for the grease monkey, who did a good job, as a tip.
...as I left I remembered the recent discussion on this thread.