Features: Design for wet and muddy surfaces. Extremely low rolling resistance. Good for rocky surfaces. Tyres can be : Tubed Tubeless Solid Tubeless or Tubed You will find many MTB tyres designated as 1. Tubeless ready 2. Tubeless or 3. UST meaning it can work with wheel setup which is tubeless You can use a tyre which is not specifically marked tubeless ready without tubes albeit with some precaution and practice.