The Trigger rolls fast on asphalt hard-pack & gravel paths. Ideally for those looking to get the most out of a smooth fast cyclo-cross course or your favorite gravel roads. This tyre rolls great on & off road. The 38c produced with Endurant casing & Blackbelt for extra puncture protection.> Casing: 60 TPI> Bead: foldable> Butyl wrapped bead = 2 Bliss Ready> Compound: GRIPTON> Flat Protection: Endurant Casing & Black Belt