Small enough to sneak its way into existing 29` frames yet voluptuous enough to give the supple bounce fat tires are famous for Small enough to sneak its way into existing 29` frames yet voluptuous enough to give the supple bounce fat tires are famous for Fast centerline for drag-free speed and square side blocks to hang onto off camber trails Light - Lighter weight compound conforms to trail objects while still providing a happy balance between low rotational weight and reliability FR - 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 TCS - WTB`s Tubeless Compatible System, sealant based tubeless system with improved bead shape