With soft rubber compounds that stick to wet roots and rocks and well spaced knobs that allow the tyre to clean well this mud munching tyre is made for riders who won39t shy away from an environmental challenge delivering traction in sections that most riders won39t consider hiking overgt casing 60 tpi dual plygt bead wiregt compound base 70a top 42agt pinch protection butyl inserts at beadgt 650b x 23 psi 25 50