Knobby Knife extends life of dirt bike tires
Tennessee man's invention restores square edges to the knobs on the tires of dirt bikes.
http://www.wbir.com/video/1632369461001/0/Knobby-Knife-extends-life-of-dirt-bike-tires
http://download.gannett.edgesuite.net/wbir/brightcove/29913744001/29913744001_1632395308001_th-1632384353001.jpg?pubId=29913744001
Knobby Knife extends life of dirt bike tires
Tennessee man's invention restores square edges to the knobs on the tires of dirt bikes.
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