Tight enough tread spacing for high speed, drag-free onslaughts yet blocky and tall enough to really dig in when it comes time to slam on the brakesTough - A double layer of light casing, TCS Tough tires are composed of two full layers of casing, bead-to-bead, leaving no area unprotected on our burliest tiresFR - Fast Rolling, with WTB`s Dual DNA rubber compound that optimizes efficiency, traction and durability, A firm, long-wearing centerline tread with softer side knobsTCS - WTB`s Tubeless Compatible System, sealant based tubeless system with improved bead shape TT - WTB`s new triple compound, TriTec featuring a hard base level, medium center knobs and softer shoulder knobs for improved traction and performanceEBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kphTubeless27.5x2.4584TBLS - FoldBk/Blk50105060TOUGH/FR/TT/TCS/EBIKE25NoUPC/EAN/GTIN: 714401108912