The DirtDigger 120/90-18 is available in three hardness/rubber compounds, so it can deliver optimum performance and meet individual requirements. The high knobs of the DirtDigger are like shovels that penetrate the ground and thus provide propulsion. Perfect for cross-country or e.g. motocross, especially on deep and soft ground, the paddle wheel shows its strengths to the full. Extra soft is especially good in snow.