Schwalbe dirty dan addix mtb tyre supergravitythe schwalbe dirty dan addix mtb tyre is the ideal choice when the ground is muddy and unpredictable the tall tread blocks combined with the addix ultra soft compound bite into soft and loose terrain and provide exceptional grip at high speeds and when braking into off camber sloppy muddy corners self cleaning treadthe large gaps between the tread provides the necessary self cleaning and braking traction to keep the tyre performing to the highes