Non foldable tire. HIGH- END DH PERFORMANCE - INTERMEDIATE TO LOOSE CONDITIONS. The Chunder was designed to be our most versatile DH tire ever, with reinforced dual ply casing to stiffen the sidewall, preventing pinch flats and improving cornering ability. Casing: 60 TPI. 420/D1 Control Casing increases puncture and cut resistance. Compound: 60a. Dual ply casing. Bead: Aramid. PSI: 25-50.