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 error, my partner and I, have come up with a tool that keeps my knobbies sharp and keeps me from changing tyres as much. I can now sharpen my tyres in less than 10 minutes. I have one buddy that sharpened his tyres and he said his old tyre sharpened with KnobbyKnife was better than a new tyre bought from a store.â€
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Home page of Knobbly Knife
Adding New Life To Tired Old Tires With Knobby Knife story from Side by Side (US)