
Got a carbon handle. The insertion mechanics were good. The initial puncture was quite small, so the plug enlarged it as it entered. Unplug and drove a few hundred meters. The material of the stopper was soft, as if dried out. It escaped and separated leaving only a small piece inside the tire (not visible from the outside) which eventually exposed the puncture. Tried a second plug with slightly better results but it still fell apart after a few hundred yards only more of it was left in the tyre. Tires were 90 PSI 700c 25 road bike. Tire removed and insert checked. Both plugs fell out and rolled around the rim. I bought a second set of spark plugs to see if I got a bad batch. Tried one of these connectors and the same thing happened. As a result, I used tire glue + patches to fix the puncture.

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