Razr MT EXTREME   MUD TERRAIN Deeply sculpted center blocks maximize off-road traction while retaining a quieter ride 40,000-mile limited treadwear warranty Innovative sidewall design maximizes sidewall traction and puncture resistance Maxxis dual-cord casing ply features intertwined reinforcement fibers, dramatically improving casing strength for superior durability and toughness New tread compound featuring new chemical fillers for maximum tear resistance and tread life Our flagship mud terrain, the Razr MT was engineered with know-how gained from our involvement in off-road racing . The tire features a new off-road compound with new chemical fillers for maximum tear and chip resistance as well as tread life. The new pattern features deeply sculpted center blocks which maximize mud traction, while the RAZR MT's stone and mud ejectors improve self-cleaning performance and minimize rock retention.