Cut rubber with a thin sharp knife
In the old days Demotech preferably used a strong thick knives such as a cutlass. This is shown in the first pictures. But we learned that sharpening a broken hack saw blade (for sawing metal) makes the ideal knife. A strip of inner tire is wound around the knife where you hold it.
Pull the rubber as is shown in this picture and cut out the side close to the steel fabric embedded in the tread of the tire.
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