US inventor claims Knobbly Knife extends tyre life

ERJ staff report (DS)

Tennessee – A dirt-bike riding family from Tennessee has developed a tool called the Knobbly Knife, which can dress the knobbles on dirt bike tyres and claims the tool can extend the life of tyres by a factor of three.

The tool is similar to a hand tread cutter, in which a sharp. A tool steel blade is heated to around 500F (260C) and used to cut the rubber into shape.

Inventor Mark Evans said on his website, “Through much trial and…

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