Riders who want that classic dirt-track pattern can now get it in the new K180, a street-legal DOT tire that performs on the street and on the dirt. Vintage: Over 100 years of product performance. Inspired by American Flat Track racing, the Dunlop K180 is a street legal tire with a dirt track look. Also popular for riders building custom bikes with a street-legal flat track look. The classic, aggressive look is great for street trackers, scramblers, vintage flat track bikes, and custom bike builds.