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, â€œThrough much trial and…