Large, supported toothy side knobs and densely packed, low-centered tread The Riddler is a fast rolling tire with great cornering abilities - named after WTB athlete Nathan Riddle XC/AM tire designed for use on dry-to-damp and hardpack-to-sand trail conditions Light - Lighter weight compound conforms to trail objects while still providing a happy balance between low rotational weight and reliability Fast Rolling, with WTB`s Dual DNA rubber compound that optimizes efficiency, traction and durability, A firm, long-wearing centerline tread with softer side knobs WTB`s Tubeless Compatible System, sealant based tubeless system with improved bead shape