Newton ST Multi-condition performance, superb braking traction and aggressive cornering bite. Description From aggressive trail riding to the demands of downhill racing, the Newton ST delivers multi-condition performance, superb braking traction and aggressive cornering bite. Ramped center knobs reduce rolling resistance, while tall, arch-supported side knobs provide ample braking and cornering grip in all trail conditions. Acronyms Explained EN = 1.5 Ply Construction DH = 2 Ply Construction Premium = Balanced Weight and Durable Casing Fabric Ultimate = Lightweight Casing Fabric TC = Tubeless Complete Dynamic:R/T = Rugged-Terrain compound specifically formulated to balance grip, wear and efficiency. Dynamic:RS/T = Rugged Soft-Terrain compounded formulated for maximum grip.