The tread of choice for our world cup dh team the butcher tyres excel in even the gnarliest terrain with fast rolling ramped centre knobs and perfectly sized shoulder knobs for bite in the corners casing 60 tpi dual ply bead wire compound base 70a top 42a pinch protection butyl inserts at bead 650b x 23 psi 25 50 650b x 25 psi 25 50